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21d6dbc4a8
Props SergeyBiryukov fixes #22138 git-svn-id: http://core.svn.wordpress.org/trunk@22310 1a063a9b-81f0-0310-95a4-ce76da25c4cd
3308 lines
107 KiB
PHP
3308 lines
107 KiB
PHP
<?php
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/**
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* Main WordPress Formatting API.
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*
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* Handles many functions for formatting output.
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*
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* @package WordPress
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**/
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/**
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* Replaces common plain text characters into formatted entities
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*
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* As an example,
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* <code>
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* 'cause today's effort makes it worth tomorrow's "holiday"...
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* </code>
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* Becomes:
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* <code>
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* ’cause today’s effort makes it worth tomorrow’s “holiday”…
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* </code>
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* Code within certain html blocks are skipped.
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*
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* @since 0.71
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* @uses $wp_cockneyreplace Array of formatted entities for certain common phrases
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*
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* @param string $text The text to be formatted
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* @return string The string replaced with html entities
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*/
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function wptexturize($text) {
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global $wp_cockneyreplace;
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static $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements,
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$default_no_texturize_tags, $default_no_texturize_shortcodes;
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// No need to set up these static variables more than once
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if ( ! isset( $static_characters ) ) {
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/* translators: opening curly double quote */
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$opening_quote = _x( '“', 'opening curly double quote' );
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/* translators: closing curly double quote */
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$closing_quote = _x( '”', 'closing curly double quote' );
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/* translators: apostrophe, for example in 'cause or can't */
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$apos = _x( '’', 'apostrophe' );
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/* translators: prime, for example in 9' (nine feet) */
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$prime = _x( '′', 'prime' );
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/* translators: double prime, for example in 9" (nine inches) */
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$double_prime = _x( '″', 'double prime' );
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/* translators: opening curly single quote */
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$opening_single_quote = _x( '‘', 'opening curly single quote' );
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/* translators: closing curly single quote */
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$closing_single_quote = _x( '’', 'closing curly single quote' );
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/* translators: en dash */
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$en_dash = _x( '–', 'en dash' );
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/* translators: em dash */
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$em_dash = _x( '—', 'em dash' );
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$default_no_texturize_tags = array('pre', 'code', 'kbd', 'style', 'script', 'tt');
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$default_no_texturize_shortcodes = array('code');
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// if a plugin has provided an autocorrect array, use it
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if ( isset($wp_cockneyreplace) ) {
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$cockney = array_keys($wp_cockneyreplace);
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$cockneyreplace = array_values($wp_cockneyreplace);
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} elseif ( "'" != $apos ) { // Only bother if we're doing a replacement.
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$cockney = array( "'tain't", "'twere", "'twas", "'tis", "'twill", "'til", "'bout", "'nuff", "'round", "'cause" );
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$cockneyreplace = array( $apos . "tain" . $apos . "t", $apos . "twere", $apos . "twas", $apos . "tis", $apos . "twill", $apos . "til", $apos . "bout", $apos . "nuff", $apos . "round", $apos . "cause" );
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} else {
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$cockney = $cockneyreplace = array();
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}
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$static_characters = array_merge( array( '---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'\'', ' (tm)' ), $cockney );
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$static_replacements = array_merge( array( $em_dash, ' ' . $em_dash . ' ', $en_dash, ' ' . $en_dash . ' ', 'xn--', '…', $opening_quote, $closing_quote, ' ™' ), $cockneyreplace );
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$dynamic = array();
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if ( "'" != $apos ) {
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$dynamic[ '/\'(\d\d(?:’|\')?s)/' ] = $apos . '$1'; // '99's
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$dynamic[ '/\'(\d)/' ] = $apos . '$1'; // '99
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}
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if ( "'" != $opening_single_quote )
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$dynamic[ '/(\s|\A|[([{<]|")\'/' ] = '$1' . $opening_single_quote; // opening single quote, even after (, {, <, [
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if ( '"' != $double_prime )
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$dynamic[ '/(\d)"/' ] = '$1' . $double_prime; // 9" (double prime)
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if ( "'" != $prime )
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$dynamic[ '/(\d)\'/' ] = '$1' . $prime; // 9' (prime)
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if ( "'" != $apos )
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$dynamic[ '/(\S)\'([^\'\s])/' ] = '$1' . $apos . '$2'; // apostrophe in a word
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if ( '"' != $opening_quote )
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$dynamic[ '/(\s|\A|[([{<])"(?!\s)/' ] = '$1' . $opening_quote . '$2'; // opening double quote, even after (, {, <, [
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if ( '"' != $closing_quote )
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$dynamic[ '/"(\s|\S|\Z)/' ] = $closing_quote . '$1'; // closing double quote
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if ( "'" != $closing_single_quote )
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$dynamic[ '/\'([\s.]|\Z)/' ] = $closing_single_quote . '$1'; // closing single quote
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$dynamic[ '/\b(\d+)x(\d+)\b/' ] = '$1×$2'; // 9x9 (times)
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$dynamic_characters = array_keys( $dynamic );
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$dynamic_replacements = array_values( $dynamic );
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}
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// Transform into regexp sub-expression used in _wptexturize_pushpop_element
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// Must do this every time in case plugins use these filters in a context sensitive manner
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$no_texturize_tags = '(' . implode('|', apply_filters('no_texturize_tags', $default_no_texturize_tags) ) . ')';
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$no_texturize_shortcodes = '(' . implode('|', apply_filters('no_texturize_shortcodes', $default_no_texturize_shortcodes) ) . ')';
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$no_texturize_tags_stack = array();
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$no_texturize_shortcodes_stack = array();
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$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
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foreach ( $textarr as &$curl ) {
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if ( empty( $curl ) )
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continue;
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// Only call _wptexturize_pushpop_element if first char is correct tag opening
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$first = $curl[0];
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if ( '<' === $first ) {
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_wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>');
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} elseif ( '[' === $first ) {
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_wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']');
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} elseif ( empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack) ) {
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// This is not a tag, nor is the texturization disabled static strings
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$curl = str_replace($static_characters, $static_replacements, $curl);
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// regular expressions
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$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);
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}
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$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl);
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}
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return implode( '', $textarr );
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}
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/**
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* Search for disabled element tags. Push element to stack on tag open and pop
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* on tag close. Assumes first character of $text is tag opening.
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*
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* @access private
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* @since 2.9.0
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*
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* @param string $text Text to check. First character is assumed to be $opening
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* @param array $stack Array used as stack of opened tag elements
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* @param string $disabled_elements Tags to match against formatted as regexp sub-expression
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* @param string $opening Tag opening character, assumed to be 1 character long
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* @param string $closing Tag closing character
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*/
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function _wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') {
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// Check if it is a closing tag -- otherwise assume opening tag
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if (strncmp($opening . '/', $text, 2)) {
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// Opening? Check $text+1 against disabled elements
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if (preg_match('/^' . $disabled_elements . '\b/', substr($text, 1), $matches)) {
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/*
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* This disables texturize until we find a closing tag of our type
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* (e.g. <pre>) even if there was invalid nesting before that
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*
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* Example: in the case <pre>sadsadasd</code>"baba"</pre>
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* "baba" won't be texturize
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*/
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array_push($stack, $matches[1]);
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}
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} else {
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// Closing? Check $text+2 against disabled elements
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$c = preg_quote($closing, '/');
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if (preg_match('/^' . $disabled_elements . $c . '/', substr($text, 2), $matches)) {
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$last = array_pop($stack);
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// Make sure it matches the opening tag
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if ($last != $matches[1])
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array_push($stack, $last);
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}
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}
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}
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/**
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* Replaces double line-breaks with paragraph elements.
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*
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* A group of regex replaces used to identify text formatted with newlines and
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* replace double line-breaks with HTML paragraph tags. The remaining
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* line-breaks after conversion become <<br />> tags, unless $br is set to '0'
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* or 'false'.
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*
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* @since 0.71
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*
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* @param string $pee The text which has to be formatted.
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* @param bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true.
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* @return string Text which has been converted into correct paragraph tags.
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*/
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function wpautop($pee, $br = true) {
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$pre_tags = array();
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if ( trim($pee) === '' )
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return '';
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$pee = $pee . "\n"; // just to make things a little easier, pad the end
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if ( strpos($pee, '<pre') !== false ) {
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$pee_parts = explode( '</pre>', $pee );
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$last_pee = array_pop($pee_parts);
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$pee = '';
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$i = 0;
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foreach ( $pee_parts as $pee_part ) {
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$start = strpos($pee_part, '<pre');
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// Malformed html?
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if ( $start === false ) {
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$pee .= $pee_part;
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continue;
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}
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$name = "<pre wp-pre-tag-$i></pre>";
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$pre_tags[$name] = substr( $pee_part, $start ) . '</pre>';
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$pee .= substr( $pee_part, 0, $start ) . $name;
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$i++;
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}
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$pee .= $last_pee;
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}
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$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
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// Space things out a little
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$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|noscript|samp|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';
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$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
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$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
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$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
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if ( strpos($pee, '<object') !== false ) {
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$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
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$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
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}
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$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
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// make paragraphs, including one at the end
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$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
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$pee = '';
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foreach ( $pees as $tinkle )
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$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
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$pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
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$pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);
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$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
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$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
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$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
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$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
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$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
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$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
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if ( $br ) {
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$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', '_autop_newline_preservation_helper', $pee);
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$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
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$pee = str_replace('<WPPreserveNewline />', "\n", $pee);
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}
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$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
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$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
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$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
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if ( !empty($pre_tags) )
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$pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee);
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return $pee;
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}
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/**
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* Newline preservation help function for wpautop
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*
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* @since 3.1.0
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* @access private
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* @param array $matches preg_replace_callback matches array
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* @return string
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*/
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function _autop_newline_preservation_helper( $matches ) {
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return str_replace("\n", "<WPPreserveNewline />", $matches[0]);
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}
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/**
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* Don't auto-p wrap shortcodes that stand alone
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*
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* Ensures that shortcodes are not wrapped in <<p>>...<</p>>.
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*
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* @since 2.9.0
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*
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* @param string $pee The content.
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* @return string The filtered content.
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*/
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function shortcode_unautop( $pee ) {
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global $shortcode_tags;
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if ( empty( $shortcode_tags ) || !is_array( $shortcode_tags ) ) {
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return $pee;
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}
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$tagregexp = join( '|', array_map( 'preg_quote', array_keys( $shortcode_tags ) ) );
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$pattern =
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'/'
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. '<p>' // Opening paragraph
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. '\\s*+' // Optional leading whitespace
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. '(' // 1: The shortcode
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. '\\[' // Opening bracket
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. "($tagregexp)" // 2: Shortcode name
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. '\\b' // Word boundary
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// Unroll the loop: Inside the opening shortcode tag
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. '[^\\]\\/]*' // Not a closing bracket or forward slash
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. '(?:'
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. '\\/(?!\\])' // A forward slash not followed by a closing bracket
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. '[^\\]\\/]*' // Not a closing bracket or forward slash
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. ')*?'
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. '(?:'
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. '\\/\\]' // Self closing tag and closing bracket
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. '|'
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. '\\]' // Closing bracket
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. '(?:' // Unroll the loop: Optionally, anything between the opening and closing shortcode tags
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. '[^\\[]*+' // Not an opening bracket
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. '(?:'
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. '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
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. '[^\\[]*+' // Not an opening bracket
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. ')*+'
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. '\\[\\/\\2\\]' // Closing shortcode tag
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. ')?'
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. ')'
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. ')'
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. '\\s*+' // optional trailing whitespace
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. '<\\/p>' // closing paragraph
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. '/s';
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return preg_replace( $pattern, '$1', $pee );
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}
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/**
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* Checks to see if a string is utf8 encoded.
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*
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* NOTE: This function checks for 5-Byte sequences, UTF8
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* has Bytes Sequences with a maximum length of 4.
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*
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* @author bmorel at ssi dot fr (modified)
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* @since 1.2.1
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*
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* @param string $str The string to be checked
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* @return bool True if $str fits a UTF-8 model, false otherwise.
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*/
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function seems_utf8($str) {
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$length = strlen($str);
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for ($i=0; $i < $length; $i++) {
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$c = ord($str[$i]);
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if ($c < 0x80) $n = 0; # 0bbbbbbb
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elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb
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elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb
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elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb
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elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb
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elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b
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else return false; # Does not match any model
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for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
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if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
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return false;
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}
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}
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return true;
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}
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/**
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* Converts a number of special characters into their HTML entities.
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*
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* Specifically deals with: &, <, >, ", and '.
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*
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* $quote_style can be set to ENT_COMPAT to encode " to
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* ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded.
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*
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* @since 1.2.2
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*
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* @param string $string The text which is to be encoded.
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* @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
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* @param string $charset Optional. The character encoding of the string. Default is false.
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* @param boolean $double_encode Optional. Whether to encode existing html entities. Default is false.
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* @return string The encoded text with HTML entities.
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*/
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function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {
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$string = (string) $string;
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if ( 0 === strlen( $string ) )
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return '';
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// Don't bother if there are no specialchars - saves some processing
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if ( ! preg_match( '/[&<>"\']/', $string ) )
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return $string;
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// Account for the previous behaviour of the function when the $quote_style is not an accepted value
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if ( empty( $quote_style ) )
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$quote_style = ENT_NOQUOTES;
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elseif ( ! in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) )
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$quote_style = ENT_QUOTES;
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// Store the site charset as a static to avoid multiple calls to wp_load_alloptions()
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if ( ! $charset ) {
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static $_charset;
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if ( ! isset( $_charset ) ) {
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$alloptions = wp_load_alloptions();
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$_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : '';
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}
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$charset = $_charset;
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}
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if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) )
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$charset = 'UTF-8';
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$_quote_style = $quote_style;
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|
|
|
if ( $quote_style === 'double' ) {
|
|
$quote_style = ENT_COMPAT;
|
|
$_quote_style = ENT_COMPAT;
|
|
} elseif ( $quote_style === 'single' ) {
|
|
$quote_style = ENT_NOQUOTES;
|
|
}
|
|
|
|
// Handle double encoding ourselves
|
|
if ( $double_encode ) {
|
|
$string = @htmlspecialchars( $string, $quote_style, $charset );
|
|
} else {
|
|
// Decode & into &
|
|
$string = wp_specialchars_decode( $string, $_quote_style );
|
|
|
|
// Guarantee every &entity; is valid or re-encode the &
|
|
$string = wp_kses_normalize_entities( $string );
|
|
|
|
// Now re-encode everything except &entity;
|
|
$string = preg_split( '/(&#?x?[0-9a-z]+;)/i', $string, -1, PREG_SPLIT_DELIM_CAPTURE );
|
|
|
|
for ( $i = 0; $i < count( $string ); $i += 2 )
|
|
$string[$i] = @htmlspecialchars( $string[$i], $quote_style, $charset );
|
|
|
|
$string = implode( '', $string );
|
|
}
|
|
|
|
// Backwards compatibility
|
|
if ( 'single' === $_quote_style )
|
|
$string = str_replace( "'", ''', $string );
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Converts a number of HTML entities into their special characters.
|
|
*
|
|
* Specifically deals with: &, <, >, ", and '.
|
|
*
|
|
* $quote_style can be set to ENT_COMPAT to decode " entities,
|
|
* or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded.
|
|
*
|
|
* @since 2.8
|
|
*
|
|
* @param string $string The text which is to be decoded.
|
|
* @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
|
|
* @return string The decoded text without HTML entities.
|
|
*/
|
|
function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) {
|
|
$string = (string) $string;
|
|
|
|
if ( 0 === strlen( $string ) ) {
|
|
return '';
|
|
}
|
|
|
|
// Don't bother if there are no entities - saves a lot of processing
|
|
if ( strpos( $string, '&' ) === false ) {
|
|
return $string;
|
|
}
|
|
|
|
// Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value
|
|
if ( empty( $quote_style ) ) {
|
|
$quote_style = ENT_NOQUOTES;
|
|
} elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {
|
|
$quote_style = ENT_QUOTES;
|
|
}
|
|
|
|
// More complete than get_html_translation_table( HTML_SPECIALCHARS )
|
|
$single = array( ''' => '\'', ''' => '\'' );
|
|
$single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' );
|
|
$double = array( '"' => '"', '"' => '"', '"' => '"' );
|
|
$double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' );
|
|
$others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' );
|
|
$others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' );
|
|
|
|
if ( $quote_style === ENT_QUOTES ) {
|
|
$translation = array_merge( $single, $double, $others );
|
|
$translation_preg = array_merge( $single_preg, $double_preg, $others_preg );
|
|
} elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) {
|
|
$translation = array_merge( $double, $others );
|
|
$translation_preg = array_merge( $double_preg, $others_preg );
|
|
} elseif ( $quote_style === 'single' ) {
|
|
$translation = array_merge( $single, $others );
|
|
$translation_preg = array_merge( $single_preg, $others_preg );
|
|
} elseif ( $quote_style === ENT_NOQUOTES ) {
|
|
$translation = $others;
|
|
$translation_preg = $others_preg;
|
|
}
|
|
|
|
// Remove zero padding on numeric entities
|
|
$string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string );
|
|
|
|
// Replace characters according to translation table
|
|
return strtr( $string, $translation );
|
|
}
|
|
|
|
/**
|
|
* Checks for invalid UTF8 in a string.
|
|
*
|
|
* @since 2.8
|
|
*
|
|
* @param string $string The text which is to be checked.
|
|
* @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false.
|
|
* @return string The checked text.
|
|
*/
|
|
function wp_check_invalid_utf8( $string, $strip = false ) {
|
|
$string = (string) $string;
|
|
|
|
if ( 0 === strlen( $string ) ) {
|
|
return '';
|
|
}
|
|
|
|
// Store the site charset as a static to avoid multiple calls to get_option()
|
|
static $is_utf8;
|
|
if ( !isset( $is_utf8 ) ) {
|
|
$is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) );
|
|
}
|
|
if ( !$is_utf8 ) {
|
|
return $string;
|
|
}
|
|
|
|
// Check for support for utf8 in the installed PCRE library once and store the result in a static
|
|
static $utf8_pcre;
|
|
if ( !isset( $utf8_pcre ) ) {
|
|
$utf8_pcre = @preg_match( '/^./u', 'a' );
|
|
}
|
|
// We can't demand utf8 in the PCRE installation, so just return the string in those cases
|
|
if ( !$utf8_pcre ) {
|
|
return $string;
|
|
}
|
|
|
|
// preg_match fails when it encounters invalid UTF8 in $string
|
|
if ( 1 === @preg_match( '/^./us', $string ) ) {
|
|
return $string;
|
|
}
|
|
|
|
// Attempt to strip the bad chars if requested (not recommended)
|
|
if ( $strip && function_exists( 'iconv' ) ) {
|
|
return iconv( 'utf-8', 'utf-8', $string );
|
|
}
|
|
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* Encode the Unicode values to be used in the URI.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $utf8_string
|
|
* @param int $length Max length of the string
|
|
* @return string String with Unicode encoded for URI.
|
|
*/
|
|
function utf8_uri_encode( $utf8_string, $length = 0 ) {
|
|
$unicode = '';
|
|
$values = array();
|
|
$num_octets = 1;
|
|
$unicode_length = 0;
|
|
|
|
$string_length = strlen( $utf8_string );
|
|
for ($i = 0; $i < $string_length; $i++ ) {
|
|
|
|
$value = ord( $utf8_string[ $i ] );
|
|
|
|
if ( $value < 128 ) {
|
|
if ( $length && ( $unicode_length >= $length ) )
|
|
break;
|
|
$unicode .= chr($value);
|
|
$unicode_length++;
|
|
} else {
|
|
if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3;
|
|
|
|
$values[] = $value;
|
|
|
|
if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length )
|
|
break;
|
|
if ( count( $values ) == $num_octets ) {
|
|
if ($num_octets == 3) {
|
|
$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]);
|
|
$unicode_length += 9;
|
|
} else {
|
|
$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]);
|
|
$unicode_length += 6;
|
|
}
|
|
|
|
$values = array();
|
|
$num_octets = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $unicode;
|
|
}
|
|
|
|
/**
|
|
* Converts all accent characters to ASCII characters.
|
|
*
|
|
* If there are no accent characters, then the string given is just returned.
|
|
*
|
|
* @since 1.2.1
|
|
*
|
|
* @param string $string Text that might have accent characters
|
|
* @return string Filtered string with replaced "nice" characters.
|
|
*/
|
|
function remove_accents($string) {
|
|
if ( !preg_match('/[\x80-\xff]/', $string) )
|
|
return $string;
|
|
|
|
if (seems_utf8($string)) {
|
|
$chars = array(
|
|
// Decompositions for Latin-1 Supplement
|
|
chr(194).chr(170) => 'a', chr(194).chr(186) => 'o',
|
|
chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
|
|
chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
|
|
chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
|
|
chr(195).chr(134) => 'AE',chr(195).chr(135) => 'C',
|
|
chr(195).chr(136) => 'E', chr(195).chr(137) => 'E',
|
|
chr(195).chr(138) => 'E', chr(195).chr(139) => 'E',
|
|
chr(195).chr(140) => 'I', chr(195).chr(141) => 'I',
|
|
chr(195).chr(142) => 'I', chr(195).chr(143) => 'I',
|
|
chr(195).chr(144) => 'D', chr(195).chr(145) => 'N',
|
|
chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
|
|
chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
|
|
chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
|
|
chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
|
|
chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
|
|
chr(195).chr(158) => 'TH',chr(195).chr(159) => 's',
|
|
chr(195).chr(160) => 'a', chr(195).chr(161) => 'a',
|
|
chr(195).chr(162) => 'a', chr(195).chr(163) => 'a',
|
|
chr(195).chr(164) => 'a', chr(195).chr(165) => 'a',
|
|
chr(195).chr(166) => 'ae',chr(195).chr(167) => 'c',
|
|
chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
|
|
chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
|
|
chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
|
|
chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
|
|
chr(195).chr(176) => 'd', chr(195).chr(177) => 'n',
|
|
chr(195).chr(178) => 'o', chr(195).chr(179) => 'o',
|
|
chr(195).chr(180) => 'o', chr(195).chr(181) => 'o',
|
|
chr(195).chr(182) => 'o', chr(195).chr(184) => 'o',
|
|
chr(195).chr(185) => 'u', chr(195).chr(186) => 'u',
|
|
chr(195).chr(187) => 'u', chr(195).chr(188) => 'u',
|
|
chr(195).chr(189) => 'y', chr(195).chr(190) => 'th',
|
|
chr(195).chr(191) => 'y', chr(195).chr(152) => 'O',
|
|
// Decompositions for Latin Extended-A
|
|
chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
|
|
chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
|
|
chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
|
|
chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
|
|
chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
|
|
chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
|
|
chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
|
|
chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
|
|
chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
|
|
chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
|
|
chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
|
|
chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
|
|
chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
|
|
chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
|
|
chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
|
|
chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
|
|
chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
|
|
chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
|
|
chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
|
|
chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
|
|
chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
|
|
chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
|
|
chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
|
|
chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
|
|
chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
|
|
chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
|
|
chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
|
|
chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
|
|
chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
|
|
chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
|
|
chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
|
|
chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
|
|
chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
|
|
chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
|
|
chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
|
|
chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
|
|
chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
|
|
chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
|
|
chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
|
|
chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
|
|
chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
|
|
chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
|
|
chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
|
|
chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
|
|
chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
|
|
chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
|
|
chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
|
|
chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
|
|
chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
|
|
chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
|
|
chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
|
|
chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
|
|
chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
|
|
chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
|
|
chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
|
|
chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
|
|
chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
|
|
chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
|
|
chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
|
|
chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
|
|
chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
|
|
chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
|
|
chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
|
|
chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
|
|
// Decompositions for Latin Extended-B
|
|
chr(200).chr(152) => 'S', chr(200).chr(153) => 's',
|
|
chr(200).chr(154) => 'T', chr(200).chr(155) => 't',
|
|
// Euro Sign
|
|
chr(226).chr(130).chr(172) => 'E',
|
|
// GBP (Pound) Sign
|
|
chr(194).chr(163) => '',
|
|
// Vowels with diacritic (Vietnamese)
|
|
// unmarked
|
|
chr(198).chr(160) => 'O', chr(198).chr(161) => 'o',
|
|
chr(198).chr(175) => 'U', chr(198).chr(176) => 'u',
|
|
// grave accent
|
|
chr(225).chr(186).chr(166) => 'A', chr(225).chr(186).chr(167) => 'a',
|
|
chr(225).chr(186).chr(176) => 'A', chr(225).chr(186).chr(177) => 'a',
|
|
chr(225).chr(187).chr(128) => 'E', chr(225).chr(187).chr(129) => 'e',
|
|
chr(225).chr(187).chr(146) => 'O', chr(225).chr(187).chr(147) => 'o',
|
|
chr(225).chr(187).chr(156) => 'O', chr(225).chr(187).chr(157) => 'o',
|
|
chr(225).chr(187).chr(170) => 'U', chr(225).chr(187).chr(171) => 'u',
|
|
chr(225).chr(187).chr(178) => 'Y', chr(225).chr(187).chr(179) => 'y',
|
|
// hook
|
|
chr(225).chr(186).chr(162) => 'A', chr(225).chr(186).chr(163) => 'a',
|
|
chr(225).chr(186).chr(168) => 'A', chr(225).chr(186).chr(169) => 'a',
|
|
chr(225).chr(186).chr(178) => 'A', chr(225).chr(186).chr(179) => 'a',
|
|
chr(225).chr(186).chr(186) => 'E', chr(225).chr(186).chr(187) => 'e',
|
|
chr(225).chr(187).chr(130) => 'E', chr(225).chr(187).chr(131) => 'e',
|
|
chr(225).chr(187).chr(136) => 'I', chr(225).chr(187).chr(137) => 'i',
|
|
chr(225).chr(187).chr(142) => 'O', chr(225).chr(187).chr(143) => 'o',
|
|
chr(225).chr(187).chr(148) => 'O', chr(225).chr(187).chr(149) => 'o',
|
|
chr(225).chr(187).chr(158) => 'O', chr(225).chr(187).chr(159) => 'o',
|
|
chr(225).chr(187).chr(166) => 'U', chr(225).chr(187).chr(167) => 'u',
|
|
chr(225).chr(187).chr(172) => 'U', chr(225).chr(187).chr(173) => 'u',
|
|
chr(225).chr(187).chr(182) => 'Y', chr(225).chr(187).chr(183) => 'y',
|
|
// tilde
|
|
chr(225).chr(186).chr(170) => 'A', chr(225).chr(186).chr(171) => 'a',
|
|
chr(225).chr(186).chr(180) => 'A', chr(225).chr(186).chr(181) => 'a',
|
|
chr(225).chr(186).chr(188) => 'E', chr(225).chr(186).chr(189) => 'e',
|
|
chr(225).chr(187).chr(132) => 'E', chr(225).chr(187).chr(133) => 'e',
|
|
chr(225).chr(187).chr(150) => 'O', chr(225).chr(187).chr(151) => 'o',
|
|
chr(225).chr(187).chr(160) => 'O', chr(225).chr(187).chr(161) => 'o',
|
|
chr(225).chr(187).chr(174) => 'U', chr(225).chr(187).chr(175) => 'u',
|
|
chr(225).chr(187).chr(184) => 'Y', chr(225).chr(187).chr(185) => 'y',
|
|
// acute accent
|
|
chr(225).chr(186).chr(164) => 'A', chr(225).chr(186).chr(165) => 'a',
|
|
chr(225).chr(186).chr(174) => 'A', chr(225).chr(186).chr(175) => 'a',
|
|
chr(225).chr(186).chr(190) => 'E', chr(225).chr(186).chr(191) => 'e',
|
|
chr(225).chr(187).chr(144) => 'O', chr(225).chr(187).chr(145) => 'o',
|
|
chr(225).chr(187).chr(154) => 'O', chr(225).chr(187).chr(155) => 'o',
|
|
chr(225).chr(187).chr(168) => 'U', chr(225).chr(187).chr(169) => 'u',
|
|
// dot below
|
|
chr(225).chr(186).chr(160) => 'A', chr(225).chr(186).chr(161) => 'a',
|
|
chr(225).chr(186).chr(172) => 'A', chr(225).chr(186).chr(173) => 'a',
|
|
chr(225).chr(186).chr(182) => 'A', chr(225).chr(186).chr(183) => 'a',
|
|
chr(225).chr(186).chr(184) => 'E', chr(225).chr(186).chr(185) => 'e',
|
|
chr(225).chr(187).chr(134) => 'E', chr(225).chr(187).chr(135) => 'e',
|
|
chr(225).chr(187).chr(138) => 'I', chr(225).chr(187).chr(139) => 'i',
|
|
chr(225).chr(187).chr(140) => 'O', chr(225).chr(187).chr(141) => 'o',
|
|
chr(225).chr(187).chr(152) => 'O', chr(225).chr(187).chr(153) => 'o',
|
|
chr(225).chr(187).chr(162) => 'O', chr(225).chr(187).chr(163) => 'o',
|
|
chr(225).chr(187).chr(164) => 'U', chr(225).chr(187).chr(165) => 'u',
|
|
chr(225).chr(187).chr(176) => 'U', chr(225).chr(187).chr(177) => 'u',
|
|
chr(225).chr(187).chr(180) => 'Y', chr(225).chr(187).chr(181) => 'y',
|
|
// Vowels with diacritic (Chinese, Hanyu Pinyin)
|
|
chr(201).chr(145) => 'a',
|
|
// macron
|
|
chr(199).chr(149) => 'U', chr(199).chr(150) => 'u',
|
|
// acute accent
|
|
chr(199).chr(151) => 'U', chr(199).chr(152) => 'u',
|
|
// caron
|
|
chr(199).chr(141) => 'A', chr(199).chr(142) => 'a',
|
|
chr(199).chr(143) => 'I', chr(199).chr(144) => 'i',
|
|
chr(199).chr(145) => 'O', chr(199).chr(146) => 'o',
|
|
chr(199).chr(147) => 'U', chr(199).chr(148) => 'u',
|
|
chr(199).chr(153) => 'U', chr(199).chr(154) => 'u',
|
|
// grave accent
|
|
chr(199).chr(155) => 'U', chr(199).chr(156) => 'u',
|
|
);
|
|
|
|
$string = strtr($string, $chars);
|
|
} else {
|
|
// Assume ISO-8859-1 if not UTF-8
|
|
$chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
|
|
.chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
|
|
.chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
|
|
.chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
|
|
.chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
|
|
.chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
|
|
.chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
|
|
.chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
|
|
.chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
|
|
.chr(252).chr(253).chr(255);
|
|
|
|
$chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
|
|
|
|
$string = strtr($string, $chars['in'], $chars['out']);
|
|
$double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
|
|
$double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
|
|
$string = str_replace($double_chars['in'], $double_chars['out'], $string);
|
|
}
|
|
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Sanitizes a filename replacing whitespace with dashes
|
|
*
|
|
* Removes special characters that are illegal in filenames on certain
|
|
* operating systems and special characters requiring special escaping
|
|
* to manipulate at the command line. Replaces spaces and consecutive
|
|
* dashes with a single dash. Trim period, dash and underscore from beginning
|
|
* and end of filename.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param string $filename The filename to be sanitized
|
|
* @return string The sanitized filename
|
|
*/
|
|
function sanitize_file_name( $filename ) {
|
|
$filename_raw = $filename;
|
|
$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));
|
|
$special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw);
|
|
$filename = str_replace($special_chars, '', $filename);
|
|
$filename = preg_replace('/[\s-]+/', '-', $filename);
|
|
$filename = trim($filename, '.-_');
|
|
|
|
// Split the filename into a base and extension[s]
|
|
$parts = explode('.', $filename);
|
|
|
|
// Return if only one extension
|
|
if ( count($parts) <= 2 )
|
|
return apply_filters('sanitize_file_name', $filename, $filename_raw);
|
|
|
|
// Process multiple extensions
|
|
$filename = array_shift($parts);
|
|
$extension = array_pop($parts);
|
|
$mimes = get_allowed_mime_types();
|
|
|
|
// Loop over any intermediate extensions. Munge them with a trailing underscore if they are a 2 - 5 character
|
|
// long alpha string not in the extension whitelist.
|
|
foreach ( (array) $parts as $part) {
|
|
$filename .= '.' . $part;
|
|
|
|
if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) {
|
|
$allowed = false;
|
|
foreach ( $mimes as $ext_preg => $mime_match ) {
|
|
$ext_preg = '!^(' . $ext_preg . ')$!i';
|
|
if ( preg_match( $ext_preg, $part ) ) {
|
|
$allowed = true;
|
|
break;
|
|
}
|
|
}
|
|
if ( !$allowed )
|
|
$filename .= '_';
|
|
}
|
|
}
|
|
$filename .= '.' . $extension;
|
|
|
|
return apply_filters('sanitize_file_name', $filename, $filename_raw);
|
|
}
|
|
|
|
/**
|
|
* Sanitize username stripping out unsafe characters.
|
|
*
|
|
* Removes tags, octets, entities, and if strict is enabled, will only keep
|
|
* alphanumeric, _, space, ., -, @. After sanitizing, it passes the username,
|
|
* raw username (the username in the parameter), and the value of $strict as
|
|
* parameters for the 'sanitize_user' filter.
|
|
*
|
|
* @since 2.0.0
|
|
* @uses apply_filters() Calls 'sanitize_user' hook on username, raw username,
|
|
* and $strict parameter.
|
|
*
|
|
* @param string $username The username to be sanitized.
|
|
* @param bool $strict If set limits $username to specific characters. Default false.
|
|
* @return string The sanitized username, after passing through filters.
|
|
*/
|
|
function sanitize_user( $username, $strict = false ) {
|
|
$raw_username = $username;
|
|
$username = wp_strip_all_tags( $username );
|
|
$username = remove_accents( $username );
|
|
// Kill octets
|
|
$username = preg_replace( '|%([a-fA-F0-9][a-fA-F0-9])|', '', $username );
|
|
$username = preg_replace( '/&.+?;/', '', $username ); // Kill entities
|
|
|
|
// If strict, reduce to ASCII for max portability.
|
|
if ( $strict )
|
|
$username = preg_replace( '|[^a-z0-9 _.\-@]|i', '', $username );
|
|
|
|
$username = trim( $username );
|
|
// Consolidate contiguous whitespace
|
|
$username = preg_replace( '|\s+|', ' ', $username );
|
|
|
|
return apply_filters( 'sanitize_user', $username, $raw_username, $strict );
|
|
}
|
|
|
|
/**
|
|
* Sanitize a string key.
|
|
*
|
|
* Keys are used as internal identifiers. Lowercase alphanumeric characters, dashes and underscores are allowed.
|
|
*
|
|
* @since 3.0.0
|
|
*
|
|
* @param string $key String key
|
|
* @return string Sanitized key
|
|
*/
|
|
function sanitize_key( $key ) {
|
|
$raw_key = $key;
|
|
$key = strtolower( $key );
|
|
$key = preg_replace( '/[^a-z0-9_\-]/', '', $key );
|
|
return apply_filters( 'sanitize_key', $key, $raw_key );
|
|
}
|
|
|
|
/**
|
|
* Sanitizes title or use fallback title.
|
|
*
|
|
* Specifically, HTML and PHP tags are stripped. Further actions can be added
|
|
* via the plugin API. If $title is empty and $fallback_title is set, the latter
|
|
* will be used.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param string $title The string to be sanitized.
|
|
* @param string $fallback_title Optional. A title to use if $title is empty.
|
|
* @param string $context Optional. The operation for which the string is sanitized
|
|
* @return string The sanitized string.
|
|
*/
|
|
function sanitize_title($title, $fallback_title = '', $context = 'save') {
|
|
$raw_title = $title;
|
|
|
|
if ( 'save' == $context )
|
|
$title = remove_accents($title);
|
|
|
|
$title = apply_filters('sanitize_title', $title, $raw_title, $context);
|
|
|
|
if ( '' === $title || false === $title )
|
|
$title = $fallback_title;
|
|
|
|
return $title;
|
|
}
|
|
|
|
function sanitize_title_for_query($title) {
|
|
return sanitize_title($title, '', 'query');
|
|
}
|
|
|
|
/**
|
|
* Sanitizes title, replacing whitespace and a few other characters with dashes.
|
|
*
|
|
* Limits the output to alphanumeric characters, underscore (_) and dash (-).
|
|
* Whitespace becomes a dash.
|
|
*
|
|
* @since 1.2.0
|
|
*
|
|
* @param string $title The title to be sanitized.
|
|
* @param string $raw_title Optional. Not used.
|
|
* @param string $context Optional. The operation for which the string is sanitized.
|
|
* @return string The sanitized title.
|
|
*/
|
|
function sanitize_title_with_dashes($title, $raw_title = '', $context = 'display') {
|
|
$title = strip_tags($title);
|
|
// Preserve escaped octets.
|
|
$title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title);
|
|
// Remove percent signs that are not part of an octet.
|
|
$title = str_replace('%', '', $title);
|
|
// Restore octets.
|
|
$title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title);
|
|
|
|
if (seems_utf8($title)) {
|
|
if (function_exists('mb_strtolower')) {
|
|
$title = mb_strtolower($title, 'UTF-8');
|
|
}
|
|
$title = utf8_uri_encode($title, 200);
|
|
}
|
|
|
|
$title = strtolower($title);
|
|
$title = preg_replace('/&.+?;/', '', $title); // kill entities
|
|
$title = str_replace('.', '-', $title);
|
|
|
|
if ( 'save' == $context ) {
|
|
// Convert nbsp, ndash and mdash to hyphens
|
|
$title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title );
|
|
|
|
// Strip these characters entirely
|
|
$title = str_replace( array(
|
|
// iexcl and iquest
|
|
'%c2%a1', '%c2%bf',
|
|
// angle quotes
|
|
'%c2%ab', '%c2%bb', '%e2%80%b9', '%e2%80%ba',
|
|
// curly quotes
|
|
'%e2%80%98', '%e2%80%99', '%e2%80%9c', '%e2%80%9d',
|
|
'%e2%80%9a', '%e2%80%9b', '%e2%80%9e', '%e2%80%9f',
|
|
// copy, reg, deg, hellip and trade
|
|
'%c2%a9', '%c2%ae', '%c2%b0', '%e2%80%a6', '%e2%84%a2',
|
|
// grave accent, acute accent, macron, caron
|
|
'%cc%80', '%cc%81', '%cc%84', '%cc%8c',
|
|
), '', $title );
|
|
|
|
// Convert times to x
|
|
$title = str_replace( '%c3%97', 'x', $title );
|
|
}
|
|
|
|
$title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
|
|
$title = preg_replace('/\s+/', '-', $title);
|
|
$title = preg_replace('|-+|', '-', $title);
|
|
$title = trim($title, '-');
|
|
|
|
return $title;
|
|
}
|
|
|
|
/**
|
|
* Ensures a string is a valid SQL order by clause.
|
|
*
|
|
* Accepts one or more columns, with or without ASC/DESC, and also accepts
|
|
* RAND().
|
|
*
|
|
* @since 2.5.1
|
|
*
|
|
* @param string $orderby Order by string to be checked.
|
|
* @return string|bool Returns the order by clause if it is a match, false otherwise.
|
|
*/
|
|
function sanitize_sql_orderby( $orderby ){
|
|
preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches);
|
|
if ( !$obmatches )
|
|
return false;
|
|
return $orderby;
|
|
}
|
|
|
|
/**
|
|
* Santizes a html classname to ensure it only contains valid characters
|
|
*
|
|
* Strips the string down to A-Z,a-z,0-9,_,-. If this results in an empty
|
|
* string then it will return the alternative value supplied.
|
|
*
|
|
* @todo Expand to support the full range of CDATA that a class attribute can contain.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param string $class The classname to be sanitized
|
|
* @param string $fallback Optional. The value to return if the sanitization end's up as an empty string.
|
|
* Defaults to an empty string.
|
|
* @return string The sanitized value
|
|
*/
|
|
function sanitize_html_class( $class, $fallback = '' ) {
|
|
//Strip out any % encoded octets
|
|
$sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class );
|
|
|
|
//Limit to A-Z,a-z,0-9,_,-
|
|
$sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized );
|
|
|
|
if ( '' == $sanitized )
|
|
$sanitized = $fallback;
|
|
|
|
return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback );
|
|
}
|
|
|
|
/**
|
|
* Converts a number of characters from a string.
|
|
*
|
|
* Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are
|
|
* converted into correct XHTML and Unicode characters are converted to the
|
|
* valid range.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $content String of characters to be converted.
|
|
* @param string $deprecated Not used.
|
|
* @return string Converted string.
|
|
*/
|
|
function convert_chars($content, $deprecated = '') {
|
|
if ( !empty( $deprecated ) )
|
|
_deprecated_argument( __FUNCTION__, '0.71' );
|
|
|
|
// Translation of invalid Unicode references range to valid range
|
|
$wp_htmltranswinuni = array(
|
|
'€' => '€', // the Euro sign
|
|
'' => '',
|
|
'‚' => '‚', // these are Windows CP1252 specific characters
|
|
'ƒ' => 'ƒ', // they would look weird on non-Windows browsers
|
|
'„' => '„',
|
|
'…' => '…',
|
|
'†' => '†',
|
|
'‡' => '‡',
|
|
'ˆ' => 'ˆ',
|
|
'‰' => '‰',
|
|
'Š' => 'Š',
|
|
'‹' => '‹',
|
|
'Œ' => 'Œ',
|
|
'' => '',
|
|
'Ž' => 'Ž',
|
|
'' => '',
|
|
'' => '',
|
|
'‘' => '‘',
|
|
'’' => '’',
|
|
'“' => '“',
|
|
'”' => '”',
|
|
'•' => '•',
|
|
'–' => '–',
|
|
'—' => '—',
|
|
'˜' => '˜',
|
|
'™' => '™',
|
|
'š' => 'š',
|
|
'›' => '›',
|
|
'œ' => 'œ',
|
|
'' => '',
|
|
'ž' => 'ž',
|
|
'Ÿ' => 'Ÿ'
|
|
);
|
|
|
|
// Remove metadata tags
|
|
$content = preg_replace('/<title>(.+?)<\/title>/','',$content);
|
|
$content = preg_replace('/<category>(.+?)<\/category>/','',$content);
|
|
|
|
// Converts lone & characters into & (a.k.a. &)
|
|
$content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content);
|
|
|
|
// Fix Word pasting
|
|
$content = strtr($content, $wp_htmltranswinuni);
|
|
|
|
// Just a little XHTML help
|
|
$content = str_replace('<br>', '<br />', $content);
|
|
$content = str_replace('<hr>', '<hr />', $content);
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Will only balance the tags if forced to and the option is set to balance tags.
|
|
*
|
|
* The option 'use_balanceTags' is used to determine whether the tags will be balanced.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $text Text to be balanced
|
|
* @param bool $force If true, forces balancing, ignoring the value of the option. Default false.
|
|
* @return string Balanced text
|
|
*/
|
|
function balanceTags( $text, $force = false ) {
|
|
if ( !$force && get_option('use_balanceTags') == 0 )
|
|
return $text;
|
|
return force_balance_tags( $text );
|
|
}
|
|
|
|
/**
|
|
* Balances tags of string using a modified stack.
|
|
*
|
|
* @since 2.0.4
|
|
*
|
|
* @author Leonard Lin <leonard@acm.org>
|
|
* @license GPL
|
|
* @copyright November 4, 2001
|
|
* @version 1.1
|
|
* @todo Make better - change loop condition to $text in 1.2
|
|
* @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004
|
|
* 1.1 Fixed handling of append/stack pop order of end text
|
|
* Added Cleaning Hooks
|
|
* 1.0 First Version
|
|
*
|
|
* @param string $text Text to be balanced.
|
|
* @return string Balanced text.
|
|
*/
|
|
function force_balance_tags( $text ) {
|
|
$tagstack = array();
|
|
$stacksize = 0;
|
|
$tagqueue = '';
|
|
$newtext = '';
|
|
// Known single-entity/self-closing tags
|
|
$single_tags = array( 'area', 'base', 'basefont', 'br', 'col', 'command', 'embed', 'frame', 'hr', 'img', 'input', 'isindex', 'link', 'meta', 'param', 'source' );
|
|
// Tags that can be immediately nested within themselves
|
|
$nestable_tags = array( 'blockquote', 'div', 'object', 'q', 'span' );
|
|
|
|
// WP bug fix for comments - in case you REALLY meant to type '< !--'
|
|
$text = str_replace('< !--', '< !--', $text);
|
|
// WP bug fix for LOVE <3 (and other situations with '<' before a number)
|
|
$text = preg_replace('#<([0-9]{1})#', '<$1', $text);
|
|
|
|
while ( preg_match("/<(\/?[\w:]*)\s*([^>]*)>/", $text, $regex) ) {
|
|
$newtext .= $tagqueue;
|
|
|
|
$i = strpos($text, $regex[0]);
|
|
$l = strlen($regex[0]);
|
|
|
|
// clear the shifter
|
|
$tagqueue = '';
|
|
// Pop or Push
|
|
if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag
|
|
$tag = strtolower(substr($regex[1],1));
|
|
// if too many closing tags
|
|
if( $stacksize <= 0 ) {
|
|
$tag = '';
|
|
// or close to be safe $tag = '/' . $tag;
|
|
}
|
|
// if stacktop value = tag close value then pop
|
|
else if ( $tagstack[$stacksize - 1] == $tag ) { // found closing tag
|
|
$tag = '</' . $tag . '>'; // Close Tag
|
|
// Pop
|
|
array_pop( $tagstack );
|
|
$stacksize--;
|
|
} else { // closing tag not at top, search for it
|
|
for ( $j = $stacksize-1; $j >= 0; $j-- ) {
|
|
if ( $tagstack[$j] == $tag ) {
|
|
// add tag to tagqueue
|
|
for ( $k = $stacksize-1; $k >= $j; $k--) {
|
|
$tagqueue .= '</' . array_pop( $tagstack ) . '>';
|
|
$stacksize--;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
$tag = '';
|
|
}
|
|
} else { // Begin Tag
|
|
$tag = strtolower($regex[1]);
|
|
|
|
// Tag Cleaning
|
|
|
|
// If it's an empty tag "< >", do nothing
|
|
if ( '' == $tag ) {
|
|
// do nothing
|
|
}
|
|
// ElseIf it presents itself as a self-closing tag...
|
|
elseif ( substr( $regex[2], -1 ) == '/' ) {
|
|
// ...but it isn't a known single-entity self-closing tag, then don't let it be treated as such and
|
|
// immediately close it with a closing tag (the tag will encapsulate no text as a result)
|
|
if ( ! in_array( $tag, $single_tags ) )
|
|
$regex[2] = trim( substr( $regex[2], 0, -1 ) ) . "></$tag";
|
|
}
|
|
// ElseIf it's a known single-entity tag but it doesn't close itself, do so
|
|
elseif ( in_array($tag, $single_tags) ) {
|
|
$regex[2] .= '/';
|
|
}
|
|
// Else it's not a single-entity tag
|
|
else {
|
|
// If the top of the stack is the same as the tag we want to push, close previous tag
|
|
if ( $stacksize > 0 && !in_array($tag, $nestable_tags) && $tagstack[$stacksize - 1] == $tag ) {
|
|
$tagqueue = '</' . array_pop( $tagstack ) . '>';
|
|
$stacksize--;
|
|
}
|
|
$stacksize = array_push( $tagstack, $tag );
|
|
}
|
|
|
|
// Attributes
|
|
$attributes = $regex[2];
|
|
if( ! empty( $attributes ) && $attributes[0] != '>' )
|
|
$attributes = ' ' . $attributes;
|
|
|
|
$tag = '<' . $tag . $attributes . '>';
|
|
//If already queuing a close tag, then put this tag on, too
|
|
if ( !empty($tagqueue) ) {
|
|
$tagqueue .= $tag;
|
|
$tag = '';
|
|
}
|
|
}
|
|
$newtext .= substr($text, 0, $i) . $tag;
|
|
$text = substr($text, $i + $l);
|
|
}
|
|
|
|
// Clear Tag Queue
|
|
$newtext .= $tagqueue;
|
|
|
|
// Add Remaining text
|
|
$newtext .= $text;
|
|
|
|
// Empty Stack
|
|
while( $x = array_pop($tagstack) )
|
|
$newtext .= '</' . $x . '>'; // Add remaining tags to close
|
|
|
|
// WP fix for the bug with HTML comments
|
|
$newtext = str_replace("< !--","<!--",$newtext);
|
|
$newtext = str_replace("< !--","< !--",$newtext);
|
|
|
|
return $newtext;
|
|
}
|
|
|
|
/**
|
|
* Acts on text which is about to be edited.
|
|
*
|
|
* The $content is run through esc_textarea(), which uses htmlspecialchars()
|
|
* to convert special characters to HTML entities. If $richedit is set to true,
|
|
* it is simply a holder for the 'format_to_edit' filter.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $content The text about to be edited.
|
|
* @param bool $richedit Whether the $content should not pass through htmlspecialchars(). Default false (meaning it will be passed).
|
|
* @return string The text after the filter (and possibly htmlspecialchars()) has been run.
|
|
*/
|
|
function format_to_edit( $content, $richedit = false ) {
|
|
$content = apply_filters( 'format_to_edit', $content );
|
|
if ( ! $richedit )
|
|
$content = esc_textarea( $content );
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Holder for the 'format_to_post' filter.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $content The text to pass through the filter.
|
|
* @return string Text returned from the 'format_to_post' filter.
|
|
*/
|
|
function format_to_post($content) {
|
|
$content = apply_filters('format_to_post', $content);
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Add leading zeros when necessary.
|
|
*
|
|
* If you set the threshold to '4' and the number is '10', then you will get
|
|
* back '0010'. If you set the threshold to '4' and the number is '5000', then you
|
|
* will get back '5000'.
|
|
*
|
|
* Uses sprintf to append the amount of zeros based on the $threshold parameter
|
|
* and the size of the number. If the number is large enough, then no zeros will
|
|
* be appended.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param mixed $number Number to append zeros to if not greater than threshold.
|
|
* @param int $threshold Digit places number needs to be to not have zeros added.
|
|
* @return string Adds leading zeros to number if needed.
|
|
*/
|
|
function zeroise($number, $threshold) {
|
|
return sprintf('%0'.$threshold.'s', $number);
|
|
}
|
|
|
|
/**
|
|
* Adds backslashes before letters and before a number at the start of a string.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $string Value to which backslashes will be added.
|
|
* @return string String with backslashes inserted.
|
|
*/
|
|
function backslashit($string) {
|
|
$string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string);
|
|
$string = preg_replace('/([a-z])/i', '\\\\\1', $string);
|
|
return $string;
|
|
}
|
|
|
|
/**
|
|
* Appends a trailing slash.
|
|
*
|
|
* Will remove trailing slash if it exists already before adding a trailing
|
|
* slash. This prevents double slashing a string or path.
|
|
*
|
|
* The primary use of this is for paths and thus should be used for paths. It is
|
|
* not restricted to paths and offers no specific path support.
|
|
*
|
|
* @since 1.2.0
|
|
* @uses untrailingslashit() Unslashes string if it was slashed already.
|
|
*
|
|
* @param string $string What to add the trailing slash to.
|
|
* @return string String with trailing slash added.
|
|
*/
|
|
function trailingslashit($string) {
|
|
return untrailingslashit($string) . '/';
|
|
}
|
|
|
|
/**
|
|
* Removes trailing slash if it exists.
|
|
*
|
|
* The primary use of this is for paths and thus should be used for paths. It is
|
|
* not restricted to paths and offers no specific path support.
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param string $string What to remove the trailing slash from.
|
|
* @return string String without the trailing slash.
|
|
*/
|
|
function untrailingslashit($string) {
|
|
return rtrim($string, '/');
|
|
}
|
|
|
|
/**
|
|
* Adds slashes to escape strings.
|
|
*
|
|
* Slashes will first be removed if magic_quotes_gpc is set, see {@link
|
|
* http://www.php.net/magic_quotes} for more details.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $gpc The string returned from HTTP request data.
|
|
* @return string Returns a string escaped with slashes.
|
|
*/
|
|
function addslashes_gpc($gpc) {
|
|
if ( get_magic_quotes_gpc() )
|
|
$gpc = stripslashes($gpc);
|
|
|
|
return esc_sql($gpc);
|
|
}
|
|
|
|
/**
|
|
* Navigates through an array and removes slashes from the values.
|
|
*
|
|
* If an array is passed, the array_map() function causes a callback to pass the
|
|
* value back to the function. The slashes from this value will removed.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param mixed $value The value to be stripped.
|
|
* @return mixed Stripped value.
|
|
*/
|
|
function stripslashes_deep($value) {
|
|
if ( is_array($value) ) {
|
|
$value = array_map('stripslashes_deep', $value);
|
|
} elseif ( is_object($value) ) {
|
|
$vars = get_object_vars( $value );
|
|
foreach ($vars as $key=>$data) {
|
|
$value->{$key} = stripslashes_deep( $data );
|
|
}
|
|
} elseif ( is_string( $value ) ) {
|
|
$value = stripslashes($value);
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Navigates through an array and encodes the values to be used in a URL.
|
|
*
|
|
*
|
|
* @since 2.2.0
|
|
*
|
|
* @param array|string $value The array or string to be encoded.
|
|
* @return array|string $value The encoded array (or string from the callback).
|
|
*/
|
|
function urlencode_deep($value) {
|
|
$value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value);
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Navigates through an array and raw encodes the values to be used in a URL.
|
|
*
|
|
* @since 3.4.0
|
|
*
|
|
* @param array|string $value The array or string to be encoded.
|
|
* @return array|string $value The encoded array (or string from the callback).
|
|
*/
|
|
function rawurlencode_deep( $value ) {
|
|
return is_array( $value ) ? array_map( 'rawurlencode_deep', $value ) : rawurlencode( $value );
|
|
}
|
|
|
|
/**
|
|
* Converts email addresses characters to HTML entities to block spam bots.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $emailaddy Email address.
|
|
* @param int $mailto Optional. Range from 0 to 1. Used for encoding.
|
|
* @return string Converted email address.
|
|
*/
|
|
function antispambot($emailaddy, $mailto=0) {
|
|
$emailNOSPAMaddy = '';
|
|
srand ((float) microtime() * 1000000);
|
|
for ($i = 0; $i < strlen($emailaddy); $i = $i + 1) {
|
|
$j = floor(rand(0, 1+$mailto));
|
|
if ($j==0) {
|
|
$emailNOSPAMaddy .= '&#'.ord(substr($emailaddy,$i,1)).';';
|
|
} elseif ($j==1) {
|
|
$emailNOSPAMaddy .= substr($emailaddy,$i,1);
|
|
} elseif ($j==2) {
|
|
$emailNOSPAMaddy .= '%'.zeroise(dechex(ord(substr($emailaddy, $i, 1))), 2);
|
|
}
|
|
}
|
|
$emailNOSPAMaddy = str_replace('@','@',$emailNOSPAMaddy);
|
|
return $emailNOSPAMaddy;
|
|
}
|
|
|
|
/**
|
|
* Callback to convert URI match to HTML A element.
|
|
*
|
|
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
|
|
* make_clickable()}.
|
|
*
|
|
* @since 2.3.2
|
|
* @access private
|
|
*
|
|
* @param array $matches Single Regex Match.
|
|
* @return string HTML A element with URI address.
|
|
*/
|
|
function _make_url_clickable_cb($matches) {
|
|
$url = $matches[2];
|
|
|
|
if ( ')' == $matches[3] && strpos( $url, '(' ) ) {
|
|
// If the trailing character is a closing parethesis, and the URL has an opening parenthesis in it, add the closing parenthesis to the URL.
|
|
// Then we can let the parenthesis balancer do its thing below.
|
|
$url .= $matches[3];
|
|
$suffix = '';
|
|
} else {
|
|
$suffix = $matches[3];
|
|
}
|
|
|
|
// Include parentheses in the URL only if paired
|
|
while ( substr_count( $url, '(' ) < substr_count( $url, ')' ) ) {
|
|
$suffix = strrchr( $url, ')' ) . $suffix;
|
|
$url = substr( $url, 0, strrpos( $url, ')' ) );
|
|
}
|
|
|
|
$url = esc_url($url);
|
|
if ( empty($url) )
|
|
return $matches[0];
|
|
|
|
return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>" . $suffix;
|
|
}
|
|
|
|
/**
|
|
* Callback to convert URL match to HTML A element.
|
|
*
|
|
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
|
|
* make_clickable()}.
|
|
*
|
|
* @since 2.3.2
|
|
* @access private
|
|
*
|
|
* @param array $matches Single Regex Match.
|
|
* @return string HTML A element with URL address.
|
|
*/
|
|
function _make_web_ftp_clickable_cb($matches) {
|
|
$ret = '';
|
|
$dest = $matches[2];
|
|
$dest = 'http://' . $dest;
|
|
$dest = esc_url($dest);
|
|
if ( empty($dest) )
|
|
return $matches[0];
|
|
|
|
// removed trailing [.,;:)] from URL
|
|
if ( in_array( substr($dest, -1), array('.', ',', ';', ':', ')') ) === true ) {
|
|
$ret = substr($dest, -1);
|
|
$dest = substr($dest, 0, strlen($dest)-1);
|
|
}
|
|
return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret";
|
|
}
|
|
|
|
/**
|
|
* Callback to convert email address match to HTML A element.
|
|
*
|
|
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
|
|
* make_clickable()}.
|
|
*
|
|
* @since 2.3.2
|
|
* @access private
|
|
*
|
|
* @param array $matches Single Regex Match.
|
|
* @return string HTML A element with email address.
|
|
*/
|
|
function _make_email_clickable_cb($matches) {
|
|
$email = $matches[2] . '@' . $matches[3];
|
|
return $matches[1] . "<a href=\"mailto:$email\">$email</a>";
|
|
}
|
|
|
|
/**
|
|
* Convert plaintext URI to HTML links.
|
|
*
|
|
* Converts URI, www and ftp, and email addresses. Finishes by fixing links
|
|
* within links.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $text Content to convert URIs.
|
|
* @return string Content with converted URIs.
|
|
*/
|
|
function make_clickable( $text ) {
|
|
$r = '';
|
|
$textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags
|
|
foreach ( $textarr as $piece ) {
|
|
if ( empty( $piece ) || ( $piece[0] == '<' && ! preg_match('|^<\s*[\w]{1,20}+://|', $piece) ) ) {
|
|
$r .= $piece;
|
|
continue;
|
|
}
|
|
|
|
// Long strings might contain expensive edge cases ...
|
|
if ( 10000 < strlen( $piece ) ) {
|
|
// ... break it up
|
|
foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses
|
|
if ( 2101 < strlen( $chunk ) ) {
|
|
$r .= $chunk; // Too big, no whitespace: bail.
|
|
} else {
|
|
$r .= make_clickable( $chunk );
|
|
}
|
|
}
|
|
} else {
|
|
$ret = " $piece "; // Pad with whitespace to simplify the regexes
|
|
|
|
$url_clickable = '~
|
|
([\\s(<.,;:!?]) # 1: Leading whitespace, or punctuation
|
|
( # 2: URL
|
|
[\\w]{1,20}+:// # Scheme and hier-part prefix
|
|
(?=\S{1,2000}\s) # Limit to URLs less than about 2000 characters long
|
|
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+ # Non-punctuation URL character
|
|
(?: # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
|
|
[\'.,;:!?)] # Punctuation URL character
|
|
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
|
|
)*
|
|
)
|
|
(\)?) # 3: Trailing closing parenthesis (for parethesis balancing post processing)
|
|
~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
|
|
// Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
|
|
|
|
$ret = preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $ret );
|
|
|
|
$ret = preg_replace_callback( '#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret );
|
|
$ret = preg_replace_callback( '#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret );
|
|
|
|
$ret = substr( $ret, 1, -1 ); // Remove our whitespace padding.
|
|
$r .= $ret;
|
|
}
|
|
}
|
|
|
|
// Cleanup of accidental links within links
|
|
$r = preg_replace( '#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r );
|
|
return $r;
|
|
}
|
|
|
|
/**
|
|
* Breaks a string into chunks by splitting at whitespace characters.
|
|
* The length of each returned chunk is as close to the specified length goal as possible,
|
|
* with the caveat that each chunk includes its trailing delimiter.
|
|
* Chunks longer than the goal are guaranteed to not have any inner whitespace.
|
|
*
|
|
* Joining the returned chunks with empty delimiters reconstructs the input string losslessly.
|
|
*
|
|
* Input string must have no null characters (or eventual transformations on output chunks must not care about null characters)
|
|
*
|
|
* <code>
|
|
* _split_str_by_whitespace( "1234 67890 1234 67890a cd 1234 890 123456789 1234567890a 45678 1 3 5 7 90 ", 10 ) ==
|
|
* array (
|
|
* 0 => '1234 67890 ', // 11 characters: Perfect split
|
|
* 1 => '1234 ', // 5 characters: '1234 67890a' was too long
|
|
* 2 => '67890a cd ', // 10 characters: '67890a cd 1234' was too long
|
|
* 3 => '1234 890 ', // 11 characters: Perfect split
|
|
* 4 => '123456789 ', // 10 characters: '123456789 1234567890a' was too long
|
|
* 5 => '1234567890a ', // 12 characters: Too long, but no inner whitespace on which to split
|
|
* 6 => ' 45678 ', // 11 characters: Perfect split
|
|
* 7 => '1 3 5 7 9', // 9 characters: End of $string
|
|
* );
|
|
* </code>
|
|
*
|
|
* @since 3.4.0
|
|
* @access private
|
|
*
|
|
* @param string $string The string to split.
|
|
* @param int $goal The desired chunk length.
|
|
* @return array Numeric array of chunks.
|
|
*/
|
|
function _split_str_by_whitespace( $string, $goal ) {
|
|
$chunks = array();
|
|
|
|
$string_nullspace = strtr( $string, "\r\n\t\v\f ", "\000\000\000\000\000\000" );
|
|
|
|
while ( $goal < strlen( $string_nullspace ) ) {
|
|
$pos = strrpos( substr( $string_nullspace, 0, $goal + 1 ), "\000" );
|
|
|
|
if ( false === $pos ) {
|
|
$pos = strpos( $string_nullspace, "\000", $goal + 1 );
|
|
if ( false === $pos ) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
$chunks[] = substr( $string, 0, $pos + 1 );
|
|
$string = substr( $string, $pos + 1 );
|
|
$string_nullspace = substr( $string_nullspace, $pos + 1 );
|
|
}
|
|
|
|
if ( $string ) {
|
|
$chunks[] = $string;
|
|
}
|
|
|
|
return $chunks;
|
|
}
|
|
|
|
/**
|
|
* Adds rel nofollow string to all HTML A elements in content.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $text Content that may contain HTML A elements.
|
|
* @return string Converted content.
|
|
*/
|
|
function wp_rel_nofollow( $text ) {
|
|
// This is a pre save filter, so text is already escaped.
|
|
$text = stripslashes($text);
|
|
$text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text);
|
|
$text = esc_sql($text);
|
|
return $text;
|
|
}
|
|
|
|
/**
|
|
* Callback to used to add rel=nofollow string to HTML A element.
|
|
*
|
|
* Will remove already existing rel="nofollow" and rel='nofollow' from the
|
|
* string to prevent from invalidating (X)HTML.
|
|
*
|
|
* @since 2.3.0
|
|
*
|
|
* @param array $matches Single Match
|
|
* @return string HTML A Element with rel nofollow.
|
|
*/
|
|
function wp_rel_nofollow_callback( $matches ) {
|
|
$text = $matches[1];
|
|
$text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text);
|
|
return "<a $text rel=\"nofollow\">";
|
|
}
|
|
|
|
/**
|
|
* Convert one smiley code to the icon graphic file equivalent.
|
|
*
|
|
* Looks up one smiley code in the $wpsmiliestrans global array and returns an
|
|
* <img> string for that smiley.
|
|
*
|
|
* @global array $wpsmiliestrans
|
|
* @since 2.8.0
|
|
*
|
|
* @param string $smiley Smiley code to convert to image.
|
|
* @return string Image string for smiley.
|
|
*/
|
|
function translate_smiley($smiley) {
|
|
global $wpsmiliestrans;
|
|
|
|
if (count($smiley) == 0) {
|
|
return '';
|
|
}
|
|
|
|
$smiley = trim(reset($smiley));
|
|
$img = $wpsmiliestrans[$smiley];
|
|
$smiley_masked = esc_attr($smiley);
|
|
|
|
$srcurl = apply_filters('smilies_src', includes_url("images/smilies/$img"), $img, site_url());
|
|
|
|
return " <img src='$srcurl' alt='$smiley_masked' class='wp-smiley' /> ";
|
|
}
|
|
|
|
/**
|
|
* Convert text equivalent of smilies to images.
|
|
*
|
|
* Will only convert smilies if the option 'use_smilies' is true and the global
|
|
* used in the function isn't empty.
|
|
*
|
|
* @since 0.71
|
|
* @uses $wp_smiliessearch
|
|
*
|
|
* @param string $text Content to convert smilies from text.
|
|
* @return string Converted content with text smilies replaced with images.
|
|
*/
|
|
function convert_smilies($text) {
|
|
global $wp_smiliessearch;
|
|
$output = '';
|
|
if ( get_option('use_smilies') && !empty($wp_smiliessearch) ) {
|
|
// HTML loop taken from texturize function, could possible be consolidated
|
|
$textarr = preg_split("/(<.*>)/U", $text, -1, PREG_SPLIT_DELIM_CAPTURE); // capture the tags as well as in between
|
|
$stop = count($textarr);// loop stuff
|
|
for ($i = 0; $i < $stop; $i++) {
|
|
$content = $textarr[$i];
|
|
if ((strlen($content) > 0) && ('<' != $content[0])) { // If it's not a tag
|
|
$content = preg_replace_callback($wp_smiliessearch, 'translate_smiley', $content);
|
|
}
|
|
$output .= $content;
|
|
}
|
|
} else {
|
|
// return default text.
|
|
$output = $text;
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Verifies that an email is valid.
|
|
*
|
|
* Does not grok i18n domains. Not RFC compliant.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $email Email address to verify.
|
|
* @param boolean $deprecated Deprecated.
|
|
* @return string|bool Either false or the valid email address.
|
|
*/
|
|
function is_email( $email, $deprecated = false ) {
|
|
if ( ! empty( $deprecated ) )
|
|
_deprecated_argument( __FUNCTION__, '3.0' );
|
|
|
|
// Test for the minimum length the email can be
|
|
if ( strlen( $email ) < 3 ) {
|
|
return apply_filters( 'is_email', false, $email, 'email_too_short' );
|
|
}
|
|
|
|
// Test for an @ character after the first position
|
|
if ( strpos( $email, '@', 1 ) === false ) {
|
|
return apply_filters( 'is_email', false, $email, 'email_no_at' );
|
|
}
|
|
|
|
// Split out the local and domain parts
|
|
list( $local, $domain ) = explode( '@', $email, 2 );
|
|
|
|
// LOCAL PART
|
|
// Test for invalid characters
|
|
if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) {
|
|
return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
|
|
}
|
|
|
|
// DOMAIN PART
|
|
// Test for sequences of periods
|
|
if ( preg_match( '/\.{2,}/', $domain ) ) {
|
|
return apply_filters( 'is_email', false, $email, 'domain_period_sequence' );
|
|
}
|
|
|
|
// Test for leading and trailing periods and whitespace
|
|
if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) {
|
|
return apply_filters( 'is_email', false, $email, 'domain_period_limits' );
|
|
}
|
|
|
|
// Split the domain into subs
|
|
$subs = explode( '.', $domain );
|
|
|
|
// Assume the domain will have at least two subs
|
|
if ( 2 > count( $subs ) ) {
|
|
return apply_filters( 'is_email', false, $email, 'domain_no_periods' );
|
|
}
|
|
|
|
// Loop through each sub
|
|
foreach ( $subs as $sub ) {
|
|
// Test for leading and trailing hyphens and whitespace
|
|
if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) {
|
|
return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' );
|
|
}
|
|
|
|
// Test for invalid characters
|
|
if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) {
|
|
return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' );
|
|
}
|
|
}
|
|
|
|
// Congratulations your email made it!
|
|
return apply_filters( 'is_email', $email, $email, null );
|
|
}
|
|
|
|
/**
|
|
* Convert to ASCII from email subjects.
|
|
*
|
|
* @since 1.2.0
|
|
*
|
|
* @param string $string Subject line
|
|
* @return string Converted string to ASCII
|
|
*/
|
|
function wp_iso_descrambler($string) {
|
|
/* this may only work with iso-8859-1, I'm afraid */
|
|
if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) {
|
|
return $string;
|
|
} else {
|
|
$subject = str_replace('_', ' ', $matches[2]);
|
|
$subject = preg_replace_callback('#\=([0-9a-f]{2})#i', '_wp_iso_convert', $subject);
|
|
return $subject;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function to convert hex encoded chars to ASCII
|
|
*
|
|
* @since 3.1.0
|
|
* @access private
|
|
* @param array $match The preg_replace_callback matches array
|
|
* @return array Converted chars
|
|
*/
|
|
function _wp_iso_convert( $match ) {
|
|
return chr( hexdec( strtolower( $match[1] ) ) );
|
|
}
|
|
|
|
/**
|
|
* Returns a date in the GMT equivalent.
|
|
*
|
|
* Requires and returns a date in the Y-m-d H:i:s format. Simply subtracts the
|
|
* value of the 'gmt_offset' option. Return format can be overridden using the
|
|
* $format parameter. The DateTime and DateTimeZone classes are used to respect
|
|
* time zone differences in DST.
|
|
*
|
|
* @since 1.2.0
|
|
*
|
|
* @uses get_option() to retrieve the the value of 'gmt_offset'.
|
|
* @param string $string The date to be converted.
|
|
* @param string $format The format string for the returned date (default is Y-m-d H:i:s)
|
|
* @return string GMT version of the date provided.
|
|
*/
|
|
function get_gmt_from_date($string, $format = 'Y-m-d H:i:s') {
|
|
preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches);
|
|
$tz = get_option('timezone_string');
|
|
if ( $tz ) {
|
|
date_default_timezone_set( $tz );
|
|
$datetime = new DateTime( $string );
|
|
$datetime->setTimezone( new DateTimeZone('UTC') );
|
|
$offset = $datetime->getOffset();
|
|
$datetime->modify( '+' . $offset / HOUR_IN_SECONDS . ' hours');
|
|
$string_gmt = gmdate($format, $datetime->format('U'));
|
|
|
|
date_default_timezone_set('UTC');
|
|
} else {
|
|
$string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
|
|
$string_gmt = gmdate($format, $string_time - get_option('gmt_offset') * HOUR_IN_SECONDS);
|
|
}
|
|
return $string_gmt;
|
|
}
|
|
|
|
/**
|
|
* Converts a GMT date into the correct format for the blog.
|
|
*
|
|
* Requires and returns in the Y-m-d H:i:s format. Simply adds the value of
|
|
* gmt_offset.Return format can be overridden using the $format parameter
|
|
*
|
|
* @since 1.2.0
|
|
*
|
|
* @param string $string The date to be converted.
|
|
* @param string $format The format string for the returned date (default is Y-m-d H:i:s)
|
|
* @return string Formatted date relative to the GMT offset.
|
|
*/
|
|
function get_date_from_gmt($string, $format = 'Y-m-d H:i:s') {
|
|
preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches);
|
|
$string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
|
|
$string_localtime = gmdate($format, $string_time + get_option('gmt_offset') * HOUR_IN_SECONDS);
|
|
return $string_localtime;
|
|
}
|
|
|
|
/**
|
|
* Computes an offset in seconds from an iso8601 timezone.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $timezone Either 'Z' for 0 offset or '±hhmm'.
|
|
* @return int|float The offset in seconds.
|
|
*/
|
|
function iso8601_timezone_to_offset($timezone) {
|
|
// $timezone is either 'Z' or '[+|-]hhmm'
|
|
if ($timezone == 'Z') {
|
|
$offset = 0;
|
|
} else {
|
|
$sign = (substr($timezone, 0, 1) == '+') ? 1 : -1;
|
|
$hours = intval(substr($timezone, 1, 2));
|
|
$minutes = intval(substr($timezone, 3, 4)) / 60;
|
|
$offset = $sign * HOUR_IN_SECONDS * ($hours + $minutes);
|
|
}
|
|
return $offset;
|
|
}
|
|
|
|
/**
|
|
* Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt].
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}.
|
|
* @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'.
|
|
* @return string The date and time in MySQL DateTime format - Y-m-d H:i:s.
|
|
*/
|
|
function iso8601_to_datetime($date_string, $timezone = 'user') {
|
|
$timezone = strtolower($timezone);
|
|
|
|
if ($timezone == 'gmt') {
|
|
|
|
preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits);
|
|
|
|
if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset
|
|
$offset = iso8601_timezone_to_offset($date_bits[7]);
|
|
} else { // we don't have a timezone, so we assume user local timezone (not server's!)
|
|
$offset = HOUR_IN_SECONDS * get_option('gmt_offset');
|
|
}
|
|
|
|
$timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]);
|
|
$timestamp -= $offset;
|
|
|
|
return gmdate('Y-m-d H:i:s', $timestamp);
|
|
|
|
} else if ($timezone == 'user') {
|
|
return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a element attributes to open links in new windows.
|
|
*
|
|
* Comment text in popup windows should be filtered through this. Right now it's
|
|
* a moderately dumb function, ideally it would detect whether a target or rel
|
|
* attribute was already there and adjust its actions accordingly.
|
|
*
|
|
* @since 0.71
|
|
*
|
|
* @param string $text Content to replace links to open in a new window.
|
|
* @return string Content that has filtered links.
|
|
*/
|
|
function popuplinks($text) {
|
|
$text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text);
|
|
return $text;
|
|
}
|
|
|
|
/**
|
|
* Strips out all characters that are not allowable in an email.
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $email Email address to filter.
|
|
* @return string Filtered email address.
|
|
*/
|
|
function sanitize_email( $email ) {
|
|
// Test for the minimum length the email can be
|
|
if ( strlen( $email ) < 3 ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'email_too_short' );
|
|
}
|
|
|
|
// Test for an @ character after the first position
|
|
if ( strpos( $email, '@', 1 ) === false ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'email_no_at' );
|
|
}
|
|
|
|
// Split out the local and domain parts
|
|
list( $local, $domain ) = explode( '@', $email, 2 );
|
|
|
|
// LOCAL PART
|
|
// Test for invalid characters
|
|
$local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local );
|
|
if ( '' === $local ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' );
|
|
}
|
|
|
|
// DOMAIN PART
|
|
// Test for sequences of periods
|
|
$domain = preg_replace( '/\.{2,}/', '', $domain );
|
|
if ( '' === $domain ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' );
|
|
}
|
|
|
|
// Test for leading and trailing periods and whitespace
|
|
$domain = trim( $domain, " \t\n\r\0\x0B." );
|
|
if ( '' === $domain ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' );
|
|
}
|
|
|
|
// Split the domain into subs
|
|
$subs = explode( '.', $domain );
|
|
|
|
// Assume the domain will have at least two subs
|
|
if ( 2 > count( $subs ) ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' );
|
|
}
|
|
|
|
// Create an array that will contain valid subs
|
|
$new_subs = array();
|
|
|
|
// Loop through each sub
|
|
foreach ( $subs as $sub ) {
|
|
// Test for leading and trailing hyphens
|
|
$sub = trim( $sub, " \t\n\r\0\x0B-" );
|
|
|
|
// Test for invalid characters
|
|
$sub = preg_replace( '/[^a-z0-9-]+/i', '', $sub );
|
|
|
|
// If there's anything left, add it to the valid subs
|
|
if ( '' !== $sub ) {
|
|
$new_subs[] = $sub;
|
|
}
|
|
}
|
|
|
|
// If there aren't 2 or more valid subs
|
|
if ( 2 > count( $new_subs ) ) {
|
|
return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' );
|
|
}
|
|
|
|
// Join valid subs into the new domain
|
|
$domain = join( '.', $new_subs );
|
|
|
|
// Put the email back together
|
|
$email = $local . '@' . $domain;
|
|
|
|
// Congratulations your email made it!
|
|
return apply_filters( 'sanitize_email', $email, $email, null );
|
|
}
|
|
|
|
/**
|
|
* Determines the difference between two timestamps.
|
|
*
|
|
* The difference is returned in a human readable format such as "1 hour",
|
|
* "5 mins", "2 days".
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param int $from Unix timestamp from which the difference begins.
|
|
* @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set.
|
|
* @return string Human readable time difference.
|
|
*/
|
|
function human_time_diff( $from, $to = '' ) {
|
|
if ( empty( $to ) )
|
|
$to = time();
|
|
$diff = (int) abs( $to - $from );
|
|
if ( $diff <= HOUR_IN_SECONDS ) {
|
|
$mins = round( $diff / MINUTE_IN_SECONDS );
|
|
if ( $mins <= 1 ) {
|
|
$mins = 1;
|
|
}
|
|
/* translators: min=minute */
|
|
$since = sprintf( _n( '%s min', '%s mins', $mins ), $mins );
|
|
} elseif ( ( $diff <= DAY_IN_SECONDS ) && ( $diff > HOUR_IN_SECONDS ) ) {
|
|
$hours = round( $diff / HOUR_IN_SECONDS );
|
|
if ( $hours <= 1 ) {
|
|
$hours = 1;
|
|
}
|
|
$since = sprintf( _n( '%s hour', '%s hours', $hours ), $hours );
|
|
} elseif ( $diff >= DAY_IN_SECONDS ) {
|
|
$days = round( $diff / DAY_IN_SECONDS );
|
|
if ( $days <= 1 ) {
|
|
$days = 1;
|
|
}
|
|
$since = sprintf( _n( '%s day', '%s days', $days ), $days );
|
|
}
|
|
return $since;
|
|
}
|
|
|
|
/**
|
|
* Generates an excerpt from the content, if needed.
|
|
*
|
|
* The excerpt word amount will be 55 words and if the amount is greater than
|
|
* that, then the string ' [...]' will be appended to the excerpt. If the string
|
|
* is less than 55 words, then the content will be returned as is.
|
|
*
|
|
* The 55 word limit can be modified by plugins/themes using the excerpt_length filter
|
|
* The ' [...]' string can be modified by plugins/themes using the excerpt_more filter
|
|
*
|
|
* @since 1.5.0
|
|
*
|
|
* @param string $text Optional. The excerpt. If set to empty, an excerpt is generated.
|
|
* @return string The excerpt.
|
|
*/
|
|
function wp_trim_excerpt($text = '') {
|
|
$raw_excerpt = $text;
|
|
if ( '' == $text ) {
|
|
$text = get_the_content('');
|
|
|
|
$text = strip_shortcodes( $text );
|
|
|
|
$text = apply_filters('the_content', $text);
|
|
$text = str_replace(']]>', ']]>', $text);
|
|
$excerpt_length = apply_filters('excerpt_length', 55);
|
|
$excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
|
|
$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
|
|
}
|
|
return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
|
|
}
|
|
|
|
/**
|
|
* Trims text to a certain number of words.
|
|
*
|
|
* This function is localized. For languages that count 'words' by the individual
|
|
* character (such as East Asian languages), the $num_words argument will apply
|
|
* to the number of individual characters.
|
|
*
|
|
* @since 3.3.0
|
|
*
|
|
* @param string $text Text to trim.
|
|
* @param int $num_words Number of words. Default 55.
|
|
* @param string $more What to append if $text needs to be trimmed. Default '…'.
|
|
* @return string Trimmed text.
|
|
*/
|
|
function wp_trim_words( $text, $num_words = 55, $more = null ) {
|
|
if ( null === $more )
|
|
$more = __( '…' );
|
|
$original_text = $text;
|
|
$text = wp_strip_all_tags( $text );
|
|
/* translators: If your word count is based on single characters (East Asian characters),
|
|
enter 'characters'. Otherwise, enter 'words'. Do not translate into your own language. */
|
|
if ( 'characters' == _x( 'words', 'word count: words or characters?' ) && preg_match( '/^utf\-?8$/i', get_option( 'blog_charset' ) ) ) {
|
|
$text = trim( preg_replace( "/[\n\r\t ]+/", ' ', $text ), ' ' );
|
|
preg_match_all( '/./u', $text, $words_array );
|
|
$words_array = array_slice( $words_array[0], 0, $num_words + 1 );
|
|
$sep = '';
|
|
} else {
|
|
$words_array = preg_split( "/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY );
|
|
$sep = ' ';
|
|
}
|
|
if ( count( $words_array ) > $num_words ) {
|
|
array_pop( $words_array );
|
|
$text = implode( $sep, $words_array );
|
|
$text = $text . $more;
|
|
} else {
|
|
$text = implode( $sep, $words_array );
|
|
}
|
|
return apply_filters( 'wp_trim_words', $text, $num_words, $more, $original_text );
|
|
}
|
|
|
|
/**
|
|
* Converts named entities into numbered entities.
|
|
*
|
|
* @since 1.5.1
|
|
*
|
|
* @param string $text The text within which entities will be converted.
|
|
* @return string Text with converted entities.
|
|
*/
|
|
function ent2ncr($text) {
|
|
|
|
// Allow a plugin to short-circuit and override the mappings.
|
|
$filtered = apply_filters( 'pre_ent2ncr', null, $text );
|
|
if( null !== $filtered )
|
|
return $filtered;
|
|
|
|
$to_ncr = array(
|
|
'"' => '"',
|
|
'&' => '&',
|
|
'⁄' => '/',
|
|
'<' => '<',
|
|
'>' => '>',
|
|
'|' => '|',
|
|
' ' => ' ',
|
|
'¡' => '¡',
|
|
'¢' => '¢',
|
|
'£' => '£',
|
|
'¤' => '¤',
|
|
'¥' => '¥',
|
|
'¦' => '¦',
|
|
'&brkbar;' => '¦',
|
|
'§' => '§',
|
|
'¨' => '¨',
|
|
'¨' => '¨',
|
|
'©' => '©',
|
|
'ª' => 'ª',
|
|
'«' => '«',
|
|
'¬' => '¬',
|
|
'­' => '­',
|
|
'®' => '®',
|
|
'¯' => '¯',
|
|
'&hibar;' => '¯',
|
|
'°' => '°',
|
|
'±' => '±',
|
|
'²' => '²',
|
|
'³' => '³',
|
|
'´' => '´',
|
|
'µ' => 'µ',
|
|
'¶' => '¶',
|
|
'·' => '·',
|
|
'¸' => '¸',
|
|
'¹' => '¹',
|
|
'º' => 'º',
|
|
'»' => '»',
|
|
'¼' => '¼',
|
|
'½' => '½',
|
|
'¾' => '¾',
|
|
'¿' => '¿',
|
|
'À' => 'À',
|
|
'Á' => 'Á',
|
|
'Â' => 'Â',
|
|
'Ã' => 'Ã',
|
|
'Ä' => 'Ä',
|
|
'Å' => 'Å',
|
|
'Æ' => 'Æ',
|
|
'Ç' => 'Ç',
|
|
'È' => 'È',
|
|
'É' => 'É',
|
|
'Ê' => 'Ê',
|
|
'Ë' => 'Ë',
|
|
'Ì' => 'Ì',
|
|
'Í' => 'Í',
|
|
'Î' => 'Î',
|
|
'Ï' => 'Ï',
|
|
'Ð' => 'Ð',
|
|
'Ñ' => 'Ñ',
|
|
'Ò' => 'Ò',
|
|
'Ó' => 'Ó',
|
|
'Ô' => 'Ô',
|
|
'Õ' => 'Õ',
|
|
'Ö' => 'Ö',
|
|
'×' => '×',
|
|
'Ø' => 'Ø',
|
|
'Ù' => 'Ù',
|
|
'Ú' => 'Ú',
|
|
'Û' => 'Û',
|
|
'Ü' => 'Ü',
|
|
'Ý' => 'Ý',
|
|
'Þ' => 'Þ',
|
|
'ß' => 'ß',
|
|
'à' => 'à',
|
|
'á' => 'á',
|
|
'â' => 'â',
|
|
'ã' => 'ã',
|
|
'ä' => 'ä',
|
|
'å' => 'å',
|
|
'æ' => 'æ',
|
|
'ç' => 'ç',
|
|
'è' => 'è',
|
|
'é' => 'é',
|
|
'ê' => 'ê',
|
|
'ë' => 'ë',
|
|
'ì' => 'ì',
|
|
'í' => 'í',
|
|
'î' => 'î',
|
|
'ï' => 'ï',
|
|
'ð' => 'ð',
|
|
'ñ' => 'ñ',
|
|
'ò' => 'ò',
|
|
'ó' => 'ó',
|
|
'ô' => 'ô',
|
|
'õ' => 'õ',
|
|
'ö' => 'ö',
|
|
'÷' => '÷',
|
|
'ø' => 'ø',
|
|
'ù' => 'ù',
|
|
'ú' => 'ú',
|
|
'û' => 'û',
|
|
'ü' => 'ü',
|
|
'ý' => 'ý',
|
|
'þ' => 'þ',
|
|
'ÿ' => 'ÿ',
|
|
'Œ' => 'Œ',
|
|
'œ' => 'œ',
|
|
'Š' => 'Š',
|
|
'š' => 'š',
|
|
'Ÿ' => 'Ÿ',
|
|
'ƒ' => 'ƒ',
|
|
'ˆ' => 'ˆ',
|
|
'˜' => '˜',
|
|
'Α' => 'Α',
|
|
'Β' => 'Β',
|
|
'Γ' => 'Γ',
|
|
'Δ' => 'Δ',
|
|
'Ε' => 'Ε',
|
|
'Ζ' => 'Ζ',
|
|
'Η' => 'Η',
|
|
'Θ' => 'Θ',
|
|
'Ι' => 'Ι',
|
|
'Κ' => 'Κ',
|
|
'Λ' => 'Λ',
|
|
'Μ' => 'Μ',
|
|
'Ν' => 'Ν',
|
|
'Ξ' => 'Ξ',
|
|
'Ο' => 'Ο',
|
|
'Π' => 'Π',
|
|
'Ρ' => 'Ρ',
|
|
'Σ' => 'Σ',
|
|
'Τ' => 'Τ',
|
|
'Υ' => 'Υ',
|
|
'Φ' => 'Φ',
|
|
'Χ' => 'Χ',
|
|
'Ψ' => 'Ψ',
|
|
'Ω' => 'Ω',
|
|
'α' => 'α',
|
|
'β' => 'β',
|
|
'γ' => 'γ',
|
|
'δ' => 'δ',
|
|
'ε' => 'ε',
|
|
'ζ' => 'ζ',
|
|
'η' => 'η',
|
|
'θ' => 'θ',
|
|
'ι' => 'ι',
|
|
'κ' => 'κ',
|
|
'λ' => 'λ',
|
|
'μ' => 'μ',
|
|
'ν' => 'ν',
|
|
'ξ' => 'ξ',
|
|
'ο' => 'ο',
|
|
'π' => 'π',
|
|
'ρ' => 'ρ',
|
|
'ς' => 'ς',
|
|
'σ' => 'σ',
|
|
'τ' => 'τ',
|
|
'υ' => 'υ',
|
|
'φ' => 'φ',
|
|
'χ' => 'χ',
|
|
'ψ' => 'ψ',
|
|
'ω' => 'ω',
|
|
'ϑ' => 'ϑ',
|
|
'ϒ' => 'ϒ',
|
|
'ϖ' => 'ϖ',
|
|
' ' => ' ',
|
|
' ' => ' ',
|
|
' ' => ' ',
|
|
'‌' => '‌',
|
|
'‍' => '‍',
|
|
'‎' => '‎',
|
|
'‏' => '‏',
|
|
'–' => '–',
|
|
'—' => '—',
|
|
'‘' => '‘',
|
|
'’' => '’',
|
|
'‚' => '‚',
|
|
'“' => '“',
|
|
'”' => '”',
|
|
'„' => '„',
|
|
'†' => '†',
|
|
'‡' => '‡',
|
|
'•' => '•',
|
|
'…' => '…',
|
|
'‰' => '‰',
|
|
'′' => '′',
|
|
'″' => '″',
|
|
'‹' => '‹',
|
|
'›' => '›',
|
|
'‾' => '‾',
|
|
'⁄' => '⁄',
|
|
'€' => '€',
|
|
'ℑ' => 'ℑ',
|
|
'℘' => '℘',
|
|
'ℜ' => 'ℜ',
|
|
'™' => '™',
|
|
'ℵ' => 'ℵ',
|
|
'↵' => '↵',
|
|
'⇐' => '⇐',
|
|
'⇑' => '⇑',
|
|
'⇒' => '⇒',
|
|
'⇓' => '⇓',
|
|
'⇔' => '⇔',
|
|
'∀' => '∀',
|
|
'∂' => '∂',
|
|
'∃' => '∃',
|
|
'∅' => '∅',
|
|
'∇' => '∇',
|
|
'∈' => '∈',
|
|
'∉' => '∉',
|
|
'∋' => '∋',
|
|
'∏' => '∏',
|
|
'∑' => '∑',
|
|
'−' => '−',
|
|
'∗' => '∗',
|
|
'√' => '√',
|
|
'∝' => '∝',
|
|
'∞' => '∞',
|
|
'∠' => '∠',
|
|
'∧' => '∧',
|
|
'∨' => '∨',
|
|
'∩' => '∩',
|
|
'∪' => '∪',
|
|
'∫' => '∫',
|
|
'∴' => '∴',
|
|
'∼' => '∼',
|
|
'≅' => '≅',
|
|
'≈' => '≈',
|
|
'≠' => '≠',
|
|
'≡' => '≡',
|
|
'≤' => '≤',
|
|
'≥' => '≥',
|
|
'⊂' => '⊂',
|
|
'⊃' => '⊃',
|
|
'⊄' => '⊄',
|
|
'⊆' => '⊆',
|
|
'⊇' => '⊇',
|
|
'⊕' => '⊕',
|
|
'⊗' => '⊗',
|
|
'⊥' => '⊥',
|
|
'⋅' => '⋅',
|
|
'⌈' => '⌈',
|
|
'⌉' => '⌉',
|
|
'⌊' => '⌊',
|
|
'⌋' => '⌋',
|
|
'⟨' => '〈',
|
|
'⟩' => '〉',
|
|
'←' => '←',
|
|
'↑' => '↑',
|
|
'→' => '→',
|
|
'↓' => '↓',
|
|
'↔' => '↔',
|
|
'◊' => '◊',
|
|
'♠' => '♠',
|
|
'♣' => '♣',
|
|
'♥' => '♥',
|
|
'♦' => '♦'
|
|
);
|
|
|
|
return str_replace( array_keys($to_ncr), array_values($to_ncr), $text );
|
|
}
|
|
|
|
/**
|
|
* Formats text for the rich text editor.
|
|
*
|
|
* The filter 'richedit_pre' is applied here. If $text is empty the filter will
|
|
* be applied to an empty string.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param string $text The text to be formatted.
|
|
* @return string The formatted text after filter is applied.
|
|
*/
|
|
function wp_richedit_pre($text) {
|
|
// Filtering a blank results in an annoying <br />\n
|
|
if ( empty($text) ) return apply_filters('richedit_pre', '');
|
|
|
|
$output = convert_chars($text);
|
|
$output = wpautop($output);
|
|
$output = htmlspecialchars($output, ENT_NOQUOTES);
|
|
|
|
return apply_filters('richedit_pre', $output);
|
|
}
|
|
|
|
/**
|
|
* Formats text for the HTML editor.
|
|
*
|
|
* Unless $output is empty it will pass through htmlspecialchars before the
|
|
* 'htmledit_pre' filter is applied.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param string $output The text to be formatted.
|
|
* @return string Formatted text after filter applied.
|
|
*/
|
|
function wp_htmledit_pre($output) {
|
|
if ( !empty($output) )
|
|
$output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > &
|
|
|
|
return apply_filters('htmledit_pre', $output);
|
|
}
|
|
|
|
/**
|
|
* Perform a deep string replace operation to ensure the values in $search are no longer present
|
|
*
|
|
* Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values
|
|
* e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that
|
|
* str_replace would return
|
|
*
|
|
* @since 2.8.1
|
|
* @access private
|
|
*
|
|
* @param string|array $search
|
|
* @param string $subject
|
|
* @return string The processed string
|
|
*/
|
|
function _deep_replace( $search, $subject ) {
|
|
$found = true;
|
|
$subject = (string) $subject;
|
|
while ( $found ) {
|
|
$found = false;
|
|
foreach ( (array) $search as $val ) {
|
|
while ( strpos( $subject, $val ) !== false ) {
|
|
$found = true;
|
|
$subject = str_replace( $val, '', $subject );
|
|
}
|
|
}
|
|
}
|
|
|
|
return $subject;
|
|
}
|
|
|
|
/**
|
|
* Escapes data for use in a MySQL query
|
|
*
|
|
* This is just a handy shortcut for $wpdb->escape(), for completeness' sake
|
|
*
|
|
* @since 2.8.0
|
|
* @param string $sql Unescaped SQL data
|
|
* @return string The cleaned $sql
|
|
*/
|
|
function esc_sql( $sql ) {
|
|
global $wpdb;
|
|
return $wpdb->escape( $sql );
|
|
}
|
|
|
|
/**
|
|
* Checks and cleans a URL.
|
|
*
|
|
* A number of characters are removed from the URL. If the URL is for displaying
|
|
* (the default behaviour) ampersands are also replaced. The 'clean_url' filter
|
|
* is applied to the returned cleaned URL.
|
|
*
|
|
* @since 2.8.0
|
|
* @uses wp_kses_bad_protocol() To only permit protocols in the URL set
|
|
* via $protocols or the common ones set in the function.
|
|
*
|
|
* @param string $url The URL to be cleaned.
|
|
* @param array $protocols Optional. An array of acceptable protocols.
|
|
* Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn' if not set.
|
|
* @param string $_context Private. Use esc_url_raw() for database usage.
|
|
* @return string The cleaned $url after the 'clean_url' filter is applied.
|
|
*/
|
|
function esc_url( $url, $protocols = null, $_context = 'display' ) {
|
|
$original_url = $url;
|
|
|
|
if ( '' == $url )
|
|
return $url;
|
|
$url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);
|
|
$strip = array('%0d', '%0a', '%0D', '%0A');
|
|
$url = _deep_replace($strip, $url);
|
|
$url = str_replace(';//', '://', $url);
|
|
/* If the URL doesn't appear to contain a scheme, we
|
|
* presume it needs http:// appended (unless a relative
|
|
* link starting with /, # or ? or a php file).
|
|
*/
|
|
if ( strpos($url, ':') === false && ! in_array( $url[0], array( '/', '#', '?' ) ) &&
|
|
! preg_match('/^[a-z0-9-]+?\.php/i', $url) )
|
|
$url = 'http://' . $url;
|
|
|
|
// Replace ampersands and single quotes only when displaying.
|
|
if ( 'display' == $_context ) {
|
|
$url = wp_kses_normalize_entities( $url );
|
|
$url = str_replace( '&', '&', $url );
|
|
$url = str_replace( "'", ''', $url );
|
|
}
|
|
|
|
if ( ! is_array( $protocols ) )
|
|
$protocols = wp_allowed_protocols();
|
|
if ( wp_kses_bad_protocol( $url, $protocols ) != $url )
|
|
return '';
|
|
|
|
return apply_filters('clean_url', $url, $original_url, $_context);
|
|
}
|
|
|
|
/**
|
|
* Performs esc_url() for database usage.
|
|
*
|
|
* @since 2.8.0
|
|
* @uses esc_url()
|
|
*
|
|
* @param string $url The URL to be cleaned.
|
|
* @param array $protocols An array of acceptable protocols.
|
|
* @return string The cleaned URL.
|
|
*/
|
|
function esc_url_raw( $url, $protocols = null ) {
|
|
return esc_url( $url, $protocols, 'db' );
|
|
}
|
|
|
|
/**
|
|
* Convert entities, while preserving already-encoded entities.
|
|
*
|
|
* @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes.
|
|
*
|
|
* @since 1.2.2
|
|
*
|
|
* @param string $myHTML The text to be converted.
|
|
* @return string Converted text.
|
|
*/
|
|
function htmlentities2($myHTML) {
|
|
$translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES );
|
|
$translation_table[chr(38)] = '&';
|
|
return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) );
|
|
}
|
|
|
|
/**
|
|
* Escape single quotes, htmlspecialchar " < > &, and fix line endings.
|
|
*
|
|
* Escapes text strings for echoing in JS. It is intended to be used for inline JS
|
|
* (in a tag attribute, for example onclick="..."). Note that the strings have to
|
|
* be in single quotes. The filter 'js_escape' is also applied here.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param string $text The text to be escaped.
|
|
* @return string Escaped text.
|
|
*/
|
|
function esc_js( $text ) {
|
|
$safe_text = wp_check_invalid_utf8( $text );
|
|
$safe_text = _wp_specialchars( $safe_text, ENT_COMPAT );
|
|
$safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) );
|
|
$safe_text = str_replace( "\r", '', $safe_text );
|
|
$safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) );
|
|
return apply_filters( 'js_escape', $safe_text, $text );
|
|
}
|
|
|
|
/**
|
|
* Escaping for HTML blocks.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param string $text
|
|
* @return string
|
|
*/
|
|
function esc_html( $text ) {
|
|
$safe_text = wp_check_invalid_utf8( $text );
|
|
$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
|
|
return apply_filters( 'esc_html', $safe_text, $text );
|
|
}
|
|
|
|
/**
|
|
* Escaping for HTML attributes.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param string $text
|
|
* @return string
|
|
*/
|
|
function esc_attr( $text ) {
|
|
$safe_text = wp_check_invalid_utf8( $text );
|
|
$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
|
|
return apply_filters( 'attribute_escape', $safe_text, $text );
|
|
}
|
|
|
|
/**
|
|
* Escaping for textarea values.
|
|
*
|
|
* @since 3.1
|
|
*
|
|
* @param string $text
|
|
* @return string
|
|
*/
|
|
function esc_textarea( $text ) {
|
|
$safe_text = htmlspecialchars( $text, ENT_QUOTES );
|
|
return apply_filters( 'esc_textarea', $safe_text, $text );
|
|
}
|
|
|
|
/**
|
|
* Escape a HTML tag name.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param string $tag_name
|
|
* @return string
|
|
*/
|
|
function tag_escape($tag_name) {
|
|
$safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) );
|
|
return apply_filters('tag_escape', $safe_tag, $tag_name);
|
|
}
|
|
|
|
/**
|
|
* Escapes text for SQL LIKE special characters % and _.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param string $text The text to be escaped.
|
|
* @return string text, safe for inclusion in LIKE query.
|
|
*/
|
|
function like_escape($text) {
|
|
return str_replace(array("%", "_"), array("\\%", "\\_"), $text);
|
|
}
|
|
|
|
/**
|
|
* Convert full URL paths to absolute paths.
|
|
*
|
|
* Removes the http or https protocols and the domain. Keeps the path '/' at the
|
|
* beginning, so it isn't a true relative link, but from the web root base.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param string $link Full URL path.
|
|
* @return string Absolute path.
|
|
*/
|
|
function wp_make_link_relative( $link ) {
|
|
return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link );
|
|
}
|
|
|
|
/**
|
|
* Sanitises various option values based on the nature of the option.
|
|
*
|
|
* This is basically a switch statement which will pass $value through a number
|
|
* of functions depending on the $option.
|
|
*
|
|
* @since 2.0.5
|
|
*
|
|
* @param string $option The name of the option.
|
|
* @param string $value The unsanitised value.
|
|
* @return string Sanitized value.
|
|
*/
|
|
function sanitize_option($option, $value) {
|
|
|
|
switch ( $option ) {
|
|
case 'admin_email' :
|
|
case 'new_admin_email' :
|
|
$value = sanitize_email( $value );
|
|
if ( ! is_email( $value ) ) {
|
|
$value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
|
|
if ( function_exists( 'add_settings_error' ) )
|
|
add_settings_error( $option, 'invalid_admin_email', __( 'The email address entered did not appear to be a valid email address. Please enter a valid email address.' ) );
|
|
}
|
|
break;
|
|
|
|
case 'thumbnail_size_w':
|
|
case 'thumbnail_size_h':
|
|
case 'medium_size_w':
|
|
case 'medium_size_h':
|
|
case 'large_size_w':
|
|
case 'large_size_h':
|
|
case 'mailserver_port':
|
|
case 'comment_max_links':
|
|
case 'page_on_front':
|
|
case 'page_for_posts':
|
|
case 'rss_excerpt_length':
|
|
case 'default_category':
|
|
case 'default_email_category':
|
|
case 'default_link_category':
|
|
case 'close_comments_days_old':
|
|
case 'comments_per_page':
|
|
case 'thread_comments_depth':
|
|
case 'users_can_register':
|
|
case 'start_of_week':
|
|
$value = absint( $value );
|
|
break;
|
|
|
|
case 'show_on_front' :
|
|
if ( ! $value )
|
|
$value = 'posts';
|
|
break;
|
|
|
|
case 'posts_per_page':
|
|
case 'posts_per_rss':
|
|
$value = (int) $value;
|
|
if ( empty($value) )
|
|
$value = 1;
|
|
if ( $value < -1 )
|
|
$value = abs($value);
|
|
break;
|
|
|
|
case 'default_ping_status':
|
|
case 'default_comment_status':
|
|
// Options that if not there have 0 value but need to be something like "closed"
|
|
if ( $value == '0' || $value == '')
|
|
$value = 'closed';
|
|
break;
|
|
|
|
case 'blogdescription':
|
|
case 'blogname':
|
|
$value = wp_kses_post( $value );
|
|
$value = esc_html( $value );
|
|
break;
|
|
|
|
case 'blog_charset':
|
|
$value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes
|
|
break;
|
|
|
|
case 'blog_public':
|
|
// This is the value if the settings checkbox is not checked on POST. Don't rely on this.
|
|
if ( null === $value )
|
|
$value = 1;
|
|
else
|
|
$value = intval( $value );
|
|
break;
|
|
|
|
case 'date_format':
|
|
case 'time_format':
|
|
case 'mailserver_url':
|
|
case 'mailserver_login':
|
|
case 'mailserver_pass':
|
|
case 'upload_path':
|
|
$value = strip_tags( $value );
|
|
$value = wp_kses_data( $value );
|
|
break;
|
|
|
|
case 'ping_sites':
|
|
$value = explode( "\n", $value );
|
|
$value = array_filter( array_map( 'trim', $value ) );
|
|
$value = array_filter( array_map( 'esc_url_raw', $value ) );
|
|
$value = implode( "\n", $value );
|
|
break;
|
|
|
|
case 'gmt_offset':
|
|
$value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes
|
|
break;
|
|
|
|
case 'siteurl':
|
|
if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) {
|
|
$value = esc_url_raw($value);
|
|
} else {
|
|
$value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
|
|
if ( function_exists('add_settings_error') )
|
|
add_settings_error('siteurl', 'invalid_siteurl', __('The WordPress address you entered did not appear to be a valid URL. Please enter a valid URL.'));
|
|
}
|
|
break;
|
|
|
|
case 'home':
|
|
if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) {
|
|
$value = esc_url_raw($value);
|
|
} else {
|
|
$value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
|
|
if ( function_exists('add_settings_error') )
|
|
add_settings_error('home', 'invalid_home', __('The Site address you entered did not appear to be a valid URL. Please enter a valid URL.'));
|
|
}
|
|
break;
|
|
|
|
case 'WPLANG':
|
|
$allowed = get_available_languages();
|
|
if ( ! in_array( $value, $allowed ) && ! empty( $value ) )
|
|
$value = get_option( $option );
|
|
break;
|
|
|
|
case 'illegal_names':
|
|
if ( ! is_array( $value ) )
|
|
$value = explode( "\n", $value );
|
|
|
|
$value = array_values( array_filter( array_map( 'trim', $value ) ) );
|
|
|
|
if ( ! $value )
|
|
$value = '';
|
|
break;
|
|
|
|
case 'limited_email_domains':
|
|
case 'banned_email_domains':
|
|
if ( ! is_array( $value ) )
|
|
$value = explode( "\n", $value );
|
|
|
|
$domains = array_values( array_filter( array_map( 'trim', $value ) ) );
|
|
$value = array();
|
|
|
|
foreach ( $domains as $domain ) {
|
|
if ( ! preg_match( '/(--|\.\.)/', $domain ) && preg_match( '|^([a-zA-Z0-9-\.])+$|', $domain ) )
|
|
$value[] = $domain;
|
|
}
|
|
if ( ! $value )
|
|
$value = '';
|
|
break;
|
|
|
|
case 'timezone_string':
|
|
$allowed_zones = timezone_identifiers_list();
|
|
if ( ! in_array( $value, $allowed_zones ) && ! empty( $value ) ) {
|
|
$value = get_option( $option ); // Resets option to stored value in the case of failed sanitization
|
|
if ( function_exists('add_settings_error') )
|
|
add_settings_error('timezone_string', 'invalid_timezone_string', __('The timezone you have entered is not valid. Please select a valid timezone.') );
|
|
}
|
|
break;
|
|
|
|
case 'permalink_structure':
|
|
case 'category_base':
|
|
case 'tag_base':
|
|
$value = esc_url_raw( $value );
|
|
$value = str_replace( 'http://', '', $value );
|
|
break;
|
|
}
|
|
|
|
$value = apply_filters("sanitize_option_{$option}", $value, $option);
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Parses a string into variables to be stored in an array.
|
|
*
|
|
* Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if
|
|
* {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on.
|
|
*
|
|
* @since 2.2.1
|
|
* @uses apply_filters() for the 'wp_parse_str' filter.
|
|
*
|
|
* @param string $string The string to be parsed.
|
|
* @param array $array Variables will be stored in this array.
|
|
*/
|
|
function wp_parse_str( $string, &$array ) {
|
|
parse_str( $string, $array );
|
|
if ( get_magic_quotes_gpc() )
|
|
$array = stripslashes_deep( $array );
|
|
$array = apply_filters( 'wp_parse_str', $array );
|
|
}
|
|
|
|
/**
|
|
* Convert lone less than signs.
|
|
*
|
|
* KSES already converts lone greater than signs.
|
|
*
|
|
* @uses wp_pre_kses_less_than_callback in the callback function.
|
|
* @since 2.3.0
|
|
*
|
|
* @param string $text Text to be converted.
|
|
* @return string Converted text.
|
|
*/
|
|
function wp_pre_kses_less_than( $text ) {
|
|
return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text);
|
|
}
|
|
|
|
/**
|
|
* Callback function used by preg_replace.
|
|
*
|
|
* @uses esc_html to format the $matches text.
|
|
* @since 2.3.0
|
|
*
|
|
* @param array $matches Populated by matches to preg_replace.
|
|
* @return string The text returned after esc_html if needed.
|
|
*/
|
|
function wp_pre_kses_less_than_callback( $matches ) {
|
|
if ( false === strpos($matches[0], '>') )
|
|
return esc_html($matches[0]);
|
|
return $matches[0];
|
|
}
|
|
|
|
/**
|
|
* WordPress implementation of PHP sprintf() with filters.
|
|
*
|
|
* @since 2.5.0
|
|
* @link http://www.php.net/sprintf
|
|
*
|
|
* @param string $pattern The string which formatted args are inserted.
|
|
* @param mixed $args,... Arguments to be formatted into the $pattern string.
|
|
* @return string The formatted string.
|
|
*/
|
|
function wp_sprintf( $pattern ) {
|
|
$args = func_get_args( );
|
|
$len = strlen($pattern);
|
|
$start = 0;
|
|
$result = '';
|
|
$arg_index = 0;
|
|
while ( $len > $start ) {
|
|
// Last character: append and break
|
|
if ( strlen($pattern) - 1 == $start ) {
|
|
$result .= substr($pattern, -1);
|
|
break;
|
|
}
|
|
|
|
// Literal %: append and continue
|
|
if ( substr($pattern, $start, 2) == '%%' ) {
|
|
$start += 2;
|
|
$result .= '%';
|
|
continue;
|
|
}
|
|
|
|
// Get fragment before next %
|
|
$end = strpos($pattern, '%', $start + 1);
|
|
if ( false === $end )
|
|
$end = $len;
|
|
$fragment = substr($pattern, $start, $end - $start);
|
|
|
|
// Fragment has a specifier
|
|
if ( $pattern[$start] == '%' ) {
|
|
// Find numbered arguments or take the next one in order
|
|
if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) {
|
|
$arg = isset($args[$matches[1]]) ? $args[$matches[1]] : '';
|
|
$fragment = str_replace("%{$matches[1]}$", '%', $fragment);
|
|
} else {
|
|
++$arg_index;
|
|
$arg = isset($args[$arg_index]) ? $args[$arg_index] : '';
|
|
}
|
|
|
|
// Apply filters OR sprintf
|
|
$_fragment = apply_filters( 'wp_sprintf', $fragment, $arg );
|
|
if ( $_fragment != $fragment )
|
|
$fragment = $_fragment;
|
|
else
|
|
$fragment = sprintf($fragment, strval($arg) );
|
|
}
|
|
|
|
// Append to result and move to next fragment
|
|
$result .= $fragment;
|
|
$start = $end;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Localize list items before the rest of the content.
|
|
*
|
|
* The '%l' must be at the first characters can then contain the rest of the
|
|
* content. The list items will have ', ', ', and', and ' and ' added depending
|
|
* on the amount of list items in the $args parameter.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param string $pattern Content containing '%l' at the beginning.
|
|
* @param array $args List items to prepend to the content and replace '%l'.
|
|
* @return string Localized list items and rest of the content.
|
|
*/
|
|
function wp_sprintf_l($pattern, $args) {
|
|
// Not a match
|
|
if ( substr($pattern, 0, 2) != '%l' )
|
|
return $pattern;
|
|
|
|
// Nothing to work with
|
|
if ( empty($args) )
|
|
return '';
|
|
|
|
// Translate and filter the delimiter set (avoid ampersands and entities here)
|
|
$l = apply_filters('wp_sprintf_l', array(
|
|
/* translators: used between list items, there is a space after the comma */
|
|
'between' => __(', '),
|
|
/* translators: used between list items, there is a space after the and */
|
|
'between_last_two' => __(', and '),
|
|
/* translators: used between only two list items, there is a space after the and */
|
|
'between_only_two' => __(' and '),
|
|
));
|
|
|
|
$args = (array) $args;
|
|
$result = array_shift($args);
|
|
if ( count($args) == 1 )
|
|
$result .= $l['between_only_two'] . array_shift($args);
|
|
// Loop when more than two args
|
|
$i = count($args);
|
|
while ( $i ) {
|
|
$arg = array_shift($args);
|
|
$i--;
|
|
if ( 0 == $i )
|
|
$result .= $l['between_last_two'] . $arg;
|
|
else
|
|
$result .= $l['between'] . $arg;
|
|
}
|
|
return $result . substr($pattern, 2);
|
|
}
|
|
|
|
/**
|
|
* Safely extracts not more than the first $count characters from html string.
|
|
*
|
|
* UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT*
|
|
* be counted as one character. For example & will be counted as 4, < as
|
|
* 3, etc.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param integer $str String to get the excerpt from.
|
|
* @param integer $count Maximum number of characters to take.
|
|
* @return string The excerpt.
|
|
*/
|
|
function wp_html_excerpt( $str, $count ) {
|
|
$str = wp_strip_all_tags( $str, true );
|
|
$str = mb_substr( $str, 0, $count );
|
|
// remove part of an entity at the end
|
|
$str = preg_replace( '/&[^;\s]{0,6}$/', '', $str );
|
|
return $str;
|
|
}
|
|
|
|
/**
|
|
* Add a Base url to relative links in passed content.
|
|
*
|
|
* By default it supports the 'src' and 'href' attributes. However this can be
|
|
* changed via the 3rd param.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $content String to search for links in.
|
|
* @param string $base The base URL to prefix to links.
|
|
* @param array $attrs The attributes which should be processed.
|
|
* @return string The processed content.
|
|
*/
|
|
function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) {
|
|
global $_links_add_base;
|
|
$_links_add_base = $base;
|
|
$attrs = implode('|', (array)$attrs);
|
|
return preg_replace_callback( "!($attrs)=(['\"])(.+?)\\2!i", '_links_add_base', $content );
|
|
}
|
|
|
|
/**
|
|
* Callback to add a base url to relative links in passed content.
|
|
*
|
|
* @since 2.7.0
|
|
* @access private
|
|
*
|
|
* @param string $m The matched link.
|
|
* @return string The processed link.
|
|
*/
|
|
function _links_add_base($m) {
|
|
global $_links_add_base;
|
|
//1 = attribute name 2 = quotation mark 3 = URL
|
|
return $m[1] . '=' . $m[2] .
|
|
( preg_match( '#^(\w{1,20}):#', $m[3], $protocol ) && in_array( $protocol[1], wp_allowed_protocols() ) ?
|
|
$m[3] :
|
|
path_join( $_links_add_base, $m[3] ) )
|
|
. $m[2];
|
|
}
|
|
|
|
/**
|
|
* Adds a Target attribute to all links in passed content.
|
|
*
|
|
* This function by default only applies to <a> tags, however this can be
|
|
* modified by the 3rd param.
|
|
*
|
|
* <b>NOTE:</b> Any current target attributed will be stripped and replaced.
|
|
*
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $content String to search for links in.
|
|
* @param string $target The Target to add to the links.
|
|
* @param array $tags An array of tags to apply to.
|
|
* @return string The processed content.
|
|
*/
|
|
function links_add_target( $content, $target = '_blank', $tags = array('a') ) {
|
|
global $_links_add_target;
|
|
$_links_add_target = $target;
|
|
$tags = implode('|', (array)$tags);
|
|
return preg_replace_callback( "!<($tags)(.+?)>!i", '_links_add_target', $content );
|
|
}
|
|
|
|
/**
|
|
* Callback to add a target attribute to all links in passed content.
|
|
*
|
|
* @since 2.7.0
|
|
* @access private
|
|
*
|
|
* @param string $m The matched link.
|
|
* @return string The processed link.
|
|
*/
|
|
function _links_add_target( $m ) {
|
|
global $_links_add_target;
|
|
$tag = $m[1];
|
|
$link = preg_replace('|(target=[\'"](.*?)[\'"])|i', '', $m[2]);
|
|
return '<' . $tag . $link . ' target="' . esc_attr( $_links_add_target ) . '">';
|
|
}
|
|
|
|
// normalize EOL characters and strip duplicate whitespace
|
|
function normalize_whitespace( $str ) {
|
|
$str = trim($str);
|
|
$str = str_replace("\r", "\n", $str);
|
|
$str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str );
|
|
return $str;
|
|
}
|
|
|
|
/**
|
|
* Properly strip all HTML tags including script and style
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string $string String containing HTML tags
|
|
* @param bool $remove_breaks optional Whether to remove left over line breaks and white space chars
|
|
* @return string The processed string.
|
|
*/
|
|
function wp_strip_all_tags($string, $remove_breaks = false) {
|
|
$string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string );
|
|
$string = strip_tags($string);
|
|
|
|
if ( $remove_breaks )
|
|
$string = preg_replace('/[\r\n\t ]+/', ' ', $string);
|
|
|
|
return trim( $string );
|
|
}
|
|
|
|
/**
|
|
* Sanitize a string from user input or from the db
|
|
*
|
|
* check for invalid UTF-8,
|
|
* Convert single < characters to entity,
|
|
* strip all tags,
|
|
* remove line breaks, tabs and extra white space,
|
|
* strip octets.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param string $str
|
|
* @return string
|
|
*/
|
|
function sanitize_text_field($str) {
|
|
$filtered = wp_check_invalid_utf8( $str );
|
|
|
|
if ( strpos($filtered, '<') !== false ) {
|
|
$filtered = wp_pre_kses_less_than( $filtered );
|
|
// This will strip extra whitespace for us.
|
|
$filtered = wp_strip_all_tags( $filtered, true );
|
|
} else {
|
|
$filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) );
|
|
}
|
|
|
|
$match = array();
|
|
$found = false;
|
|
while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) ) {
|
|
$filtered = str_replace($match[0], '', $filtered);
|
|
$found = true;
|
|
}
|
|
|
|
if ( $found ) {
|
|
// Strip out the whitespace that may now exist after removing the octets.
|
|
$filtered = trim( preg_replace('/ +/', ' ', $filtered) );
|
|
}
|
|
|
|
return apply_filters('sanitize_text_field', $filtered, $str);
|
|
}
|
|
|
|
/**
|
|
* i18n friendly version of basename()
|
|
*
|
|
* @since 3.1.0
|
|
*
|
|
* @param string $path A path.
|
|
* @param string $suffix If the filename ends in suffix this will also be cut off.
|
|
* @return string
|
|
*/
|
|
function wp_basename( $path, $suffix = '' ) {
|
|
return urldecode( basename( str_replace( array( '%2F', '%5C' ), '/', urlencode( $path ) ), $suffix ) );
|
|
}
|
|
|
|
/**
|
|
* Forever eliminate "Wordpress" from the planet (or at least the little bit we can influence).
|
|
*
|
|
* Violating our coding standards for a good function name.
|
|
*
|
|
* @since 3.0.0
|
|
*/
|
|
function capital_P_dangit( $text ) {
|
|
// Simple replacement for titles
|
|
if ( 'the_title' === current_filter() )
|
|
return str_replace( 'Wordpress', 'WordPress', $text );
|
|
// Still here? Use the more judicious replacement
|
|
static $dblq = false;
|
|
if ( false === $dblq )
|
|
$dblq = _x( '“', 'opening curly double quote' );
|
|
return str_replace(
|
|
array( ' Wordpress', '‘Wordpress', $dblq . 'Wordpress', '>Wordpress', '(Wordpress' ),
|
|
array( ' WordPress', '‘WordPress', $dblq . 'WordPress', '>WordPress', '(WordPress' ),
|
|
$text );
|
|
|
|
}
|
|
|
|
/**
|
|
* Sanitize a mime type
|
|
*
|
|
* @since 3.1.3
|
|
*
|
|
* @param string $mime_type Mime type
|
|
* @return string Sanitized mime type
|
|
*/
|
|
function sanitize_mime_type( $mime_type ) {
|
|
$sani_mime_type = preg_replace( '/[^-+*.a-zA-Z0-9\/]/', '', $mime_type );
|
|
return apply_filters( 'sanitize_mime_type', $sani_mime_type, $mime_type );
|
|
}
|
|
|
|
/**
|
|
* Sanitize space or carriage return separated URLs that are used to send trackbacks.
|
|
*
|
|
* @since 3.4.0
|
|
*
|
|
* @param string $to_ping Space or carriage return separated URLs
|
|
* @return string URLs starting with the http or https protocol, separated by a carriage return.
|
|
*/
|
|
function sanitize_trackback_urls( $to_ping ) {
|
|
$urls_to_ping = preg_split( '/[\r\n\t ]/', trim( $to_ping ), -1, PREG_SPLIT_NO_EMPTY );
|
|
foreach ( $urls_to_ping as $k => $url ) {
|
|
if ( !preg_match( '#^https?://.#i', $url ) )
|
|
unset( $urls_to_ping[$k] );
|
|
}
|
|
$urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping );
|
|
$urls_to_ping = implode( "\n", $urls_to_ping );
|
|
return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );
|
|
}
|