mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-14 14:45:45 +01:00
008ebcfae7
Merges [34134] for 3.9 branch Built from https://develop.svn.wordpress.org/branches/3.9@34148 git-svn-id: http://core.svn.wordpress.org/branches/3.9@34116 1a063a9b-81f0-0310-95a4-ce76da25c4cd
561 lines
17 KiB
PHP
561 lines
17 KiB
PHP
<?php
|
|
/**
|
|
* WordPress API for creating bbcode like tags or what WordPress calls
|
|
* "shortcodes." The tag and attribute parsing or regular expression code is
|
|
* based on the Textpattern tag parser.
|
|
*
|
|
* A few examples are below:
|
|
*
|
|
* [shortcode /]
|
|
* [shortcode foo="bar" baz="bing" /]
|
|
* [shortcode foo="bar"]content[/shortcode]
|
|
*
|
|
* Shortcode tags support attributes and enclosed content, but does not entirely
|
|
* support inline shortcodes in other shortcodes. You will have to call the
|
|
* shortcode parser in your function to account for that.
|
|
*
|
|
* {@internal
|
|
* Please be aware that the above note was made during the beta of WordPress 2.6
|
|
* and in the future may not be accurate. Please update the note when it is no
|
|
* longer the case.}}
|
|
*
|
|
* To apply shortcode tags to content:
|
|
*
|
|
* <code>
|
|
* $out = do_shortcode($content);
|
|
* </code>
|
|
*
|
|
* @link http://codex.wordpress.org/Shortcode_API
|
|
*
|
|
* @package WordPress
|
|
* @subpackage Shortcodes
|
|
* @since 2.5.0
|
|
*/
|
|
|
|
/**
|
|
* Container for storing shortcode tags and their hook to call for the shortcode
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @name $shortcode_tags
|
|
* @var array
|
|
* @global array $shortcode_tags
|
|
*/
|
|
$shortcode_tags = array();
|
|
|
|
/**
|
|
* Add hook for shortcode tag.
|
|
*
|
|
* There can only be one hook for each shortcode. Which means that if another
|
|
* plugin has a similar shortcode, it will override yours or yours will override
|
|
* theirs depending on which order the plugins are included and/or ran.
|
|
*
|
|
* Simplest example of a shortcode tag using the API:
|
|
*
|
|
* <code>
|
|
* // [footag foo="bar"]
|
|
* function footag_func($atts) {
|
|
* return "foo = {$atts[foo]}";
|
|
* }
|
|
* add_shortcode('footag', 'footag_func');
|
|
* </code>
|
|
*
|
|
* Example with nice attribute defaults:
|
|
*
|
|
* <code>
|
|
* // [bartag foo="bar"]
|
|
* function bartag_func($atts) {
|
|
* extract(shortcode_atts(array(
|
|
* 'foo' => 'no foo',
|
|
* 'baz' => 'default baz',
|
|
* ), $atts));
|
|
*
|
|
* return "foo = {$foo}";
|
|
* }
|
|
* add_shortcode('bartag', 'bartag_func');
|
|
* </code>
|
|
*
|
|
* Example with enclosed content:
|
|
*
|
|
* <code>
|
|
* // [baztag]content[/baztag]
|
|
* function baztag_func($atts, $content='') {
|
|
* return "content = $content";
|
|
* }
|
|
* add_shortcode('baztag', 'baztag_func');
|
|
* </code>
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
*
|
|
* @param string $tag Shortcode tag to be searched in post content.
|
|
* @param callable $func Hook to run when shortcode is found.
|
|
*/
|
|
function add_shortcode($tag, $func) {
|
|
global $shortcode_tags;
|
|
|
|
if ( is_callable($func) )
|
|
$shortcode_tags[$tag] = $func;
|
|
}
|
|
|
|
/**
|
|
* Removes hook for shortcode.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
*
|
|
* @param string $tag shortcode tag to remove hook for.
|
|
*/
|
|
function remove_shortcode($tag) {
|
|
global $shortcode_tags;
|
|
|
|
unset($shortcode_tags[$tag]);
|
|
}
|
|
|
|
/**
|
|
* Clear all shortcodes.
|
|
*
|
|
* This function is simple, it clears all of the shortcode tags by replacing the
|
|
* shortcodes global by a empty array. This is actually a very efficient method
|
|
* for removing all shortcodes.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
*/
|
|
function remove_all_shortcodes() {
|
|
global $shortcode_tags;
|
|
|
|
$shortcode_tags = array();
|
|
}
|
|
|
|
/**
|
|
* Whether a registered shortcode exists named $tag
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @global array $shortcode_tags
|
|
* @param string $tag
|
|
* @return boolean
|
|
*/
|
|
function shortcode_exists( $tag ) {
|
|
global $shortcode_tags;
|
|
return array_key_exists( $tag, $shortcode_tags );
|
|
}
|
|
|
|
/**
|
|
* Whether the passed content contains the specified shortcode
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @global array $shortcode_tags
|
|
* @param string $tag
|
|
* @return boolean
|
|
*/
|
|
function has_shortcode( $content, $tag ) {
|
|
if ( false === strpos( $content, '[' ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( shortcode_exists( $tag ) ) {
|
|
preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches, PREG_SET_ORDER );
|
|
if ( empty( $matches ) )
|
|
return false;
|
|
|
|
foreach ( $matches as $shortcode ) {
|
|
if ( $tag === $shortcode[2] )
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Search content for shortcodes and filter shortcodes through their hooks.
|
|
*
|
|
* If there are no shortcode tags defined, then the content will be returned
|
|
* without any filtering. This might cause issues when plugins are disabled but
|
|
* the shortcode will still show up in the post or content.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
* @uses get_shortcode_regex() Gets the search pattern for searching shortcodes.
|
|
*
|
|
* @param string $content Content to search for shortcodes
|
|
* @param bool $ignore_html When true, shortcodes inside HTML elements will be skipped.
|
|
* @return string Content with shortcodes filtered out.
|
|
*/
|
|
function do_shortcode( $content, $ignore_html = false ) {
|
|
global $shortcode_tags;
|
|
|
|
if ( false === strpos( $content, '[' ) ) {
|
|
return $content;
|
|
}
|
|
|
|
if (empty($shortcode_tags) || !is_array($shortcode_tags))
|
|
return $content;
|
|
|
|
$tagnames = array_keys($shortcode_tags);
|
|
$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
|
|
$pattern = "/\\[($tagregexp)/s";
|
|
|
|
if ( 1 !== preg_match( $pattern, $content ) ) {
|
|
// Avoids parsing HTML when there are no shortcodes or embeds anyway.
|
|
return $content;
|
|
}
|
|
|
|
$content = do_shortcodes_in_html_tags( $content, $ignore_html );
|
|
|
|
$pattern = get_shortcode_regex();
|
|
$content = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $content );
|
|
|
|
// Always restore square braces so we don't break things like <!--[if IE ]>
|
|
$content = unescape_invalid_shortcodes( $content );
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the shortcode regular expression for searching.
|
|
*
|
|
* The regular expression combines the shortcode tags in the regular expression
|
|
* in a regex class.
|
|
*
|
|
* The regular expression contains 6 different sub matches to help with parsing.
|
|
*
|
|
* 1 - An extra [ to allow for escaping shortcodes with double [[]]
|
|
* 2 - The shortcode name
|
|
* 3 - The shortcode argument list
|
|
* 4 - The self closing /
|
|
* 5 - The content of a shortcode when it wraps some content.
|
|
* 6 - An extra ] to allow for escaping shortcodes with double [[]]
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
*
|
|
* @return string The shortcode search regular expression
|
|
*/
|
|
function get_shortcode_regex() {
|
|
global $shortcode_tags;
|
|
$tagnames = array_keys($shortcode_tags);
|
|
$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
|
|
|
|
// WARNING! Do not change this regex without changing do_shortcode_tag() and strip_shortcode_tag()
|
|
// Also, see shortcode_unautop() and shortcode.js.
|
|
return
|
|
'\\[' // Opening bracket
|
|
. '(\\[?)' // 1: Optional second opening bracket for escaping shortcodes: [[tag]]
|
|
. "($tagregexp)" // 2: Shortcode name
|
|
. '(?![\\w-])' // Not followed by word character or hyphen
|
|
. '(' // 3: Unroll the loop: Inside the opening shortcode tag
|
|
. '[^\\]\\/]*' // Not a closing bracket or forward slash
|
|
. '(?:'
|
|
. '\\/(?!\\])' // A forward slash not followed by a closing bracket
|
|
. '[^\\]\\/]*' // Not a closing bracket or forward slash
|
|
. ')*?'
|
|
. ')'
|
|
. '(?:'
|
|
. '(\\/)' // 4: Self closing tag ...
|
|
. '\\]' // ... and closing bracket
|
|
. '|'
|
|
. '\\]' // Closing bracket
|
|
. '(?:'
|
|
. '(' // 5: Unroll the loop: Optionally, anything between the opening and closing shortcode tags
|
|
. '[^\\[]*+' // Not an opening bracket
|
|
. '(?:'
|
|
. '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag
|
|
. '[^\\[]*+' // Not an opening bracket
|
|
. ')*+'
|
|
. ')'
|
|
. '\\[\\/\\2\\]' // Closing shortcode tag
|
|
. ')?'
|
|
. ')'
|
|
. '(\\]?)'; // 6: Optional second closing brocket for escaping shortcodes: [[tag]]
|
|
}
|
|
|
|
/**
|
|
* Regular Expression callable for do_shortcode() for calling shortcode hook.
|
|
* @see get_shortcode_regex for details of the match array contents.
|
|
*
|
|
* @since 2.5.0
|
|
* @access private
|
|
* @uses $shortcode_tags
|
|
*
|
|
* @param array $m Regular expression match array
|
|
* @return mixed False on failure.
|
|
*/
|
|
function do_shortcode_tag( $m ) {
|
|
global $shortcode_tags;
|
|
|
|
// allow [[foo]] syntax for escaping a tag
|
|
if ( $m[1] == '[' && $m[6] == ']' ) {
|
|
return substr($m[0], 1, -1);
|
|
}
|
|
|
|
$tag = $m[2];
|
|
$attr = shortcode_parse_atts( $m[3] );
|
|
|
|
if ( isset( $m[5] ) ) {
|
|
// enclosing tag - extra parameter
|
|
return $m[1] . call_user_func( $shortcode_tags[$tag], $attr, $m[5], $tag ) . $m[6];
|
|
} else {
|
|
// self-closing tag
|
|
return $m[1] . call_user_func( $shortcode_tags[$tag], $attr, null, $tag ) . $m[6];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Search only inside HTML elements for shortcodes and process them.
|
|
*
|
|
* Any [ or ] characters remaining inside elements will be HTML encoded
|
|
* to prevent interference with shortcodes that are outside the elements.
|
|
* Assumes $content processed by KSES already. Users with unfiltered_html
|
|
* capability may get unexpected output if angle braces are nested in tags.
|
|
*
|
|
* @since 4.2.3
|
|
*
|
|
* @param string $content Content to search for shortcodes
|
|
* @param bool $ignore_html When true, all square braces inside elements will be encoded.
|
|
* @return string Content with shortcodes filtered out.
|
|
*/
|
|
function do_shortcodes_in_html_tags( $content, $ignore_html ) {
|
|
// Normalize entities in unfiltered HTML before adding placeholders.
|
|
$trans = array( '[' => '[', ']' => ']' );
|
|
$content = strtr( $content, $trans );
|
|
$trans = array( '[' => '[', ']' => ']' );
|
|
|
|
$pattern = get_shortcode_regex();
|
|
$textarr = wp_html_split( $content );
|
|
|
|
foreach ( $textarr as &$element ) {
|
|
if ( '' == $element || '<' !== $element[0] ) {
|
|
continue;
|
|
}
|
|
|
|
$noopen = false === strpos( $element, '[' );
|
|
$noclose = false === strpos( $element, ']' );
|
|
if ( $noopen || $noclose ) {
|
|
// This element does not contain shortcodes.
|
|
if ( $noopen xor $noclose ) {
|
|
// Need to encode stray [ or ] chars.
|
|
$element = strtr( $element, $trans );
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if ( $ignore_html || '<!--' === substr( $element, 0, 4 ) || '<![CDATA[' === substr( $element, 0, 9 ) ) {
|
|
// Encode all [ and ] chars.
|
|
$element = strtr( $element, $trans );
|
|
continue;
|
|
}
|
|
|
|
$attributes = wp_kses_attr_parse( $element );
|
|
if ( false === $attributes ) {
|
|
// Some plugins are doing things like [name] <[email]>.
|
|
if ( 1 === preg_match( '%^<\s*\[\[?[^\[\]]+\]%', $element ) ) {
|
|
$element = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $element );
|
|
}
|
|
|
|
// Looks like we found some crazy unfiltered HTML. Skipping it for sanity.
|
|
$element = strtr( $element, $trans );
|
|
continue;
|
|
}
|
|
|
|
// Get element name
|
|
$front = array_shift( $attributes );
|
|
$back = array_pop( $attributes );
|
|
$matches = array();
|
|
preg_match('%[a-zA-Z0-9]+%', $front, $matches);
|
|
$elname = $matches[0];
|
|
|
|
// Look for shortcodes in each attribute separately.
|
|
foreach ( $attributes as &$attr ) {
|
|
$open = strpos( $attr, '[' );
|
|
$close = strpos( $attr, ']' );
|
|
if ( false === $open || false === $close ) {
|
|
continue; // Go to next attribute. Square braces will be escaped at end of loop.
|
|
}
|
|
$double = strpos( $attr, '"' );
|
|
$single = strpos( $attr, "'" );
|
|
if ( ( false === $single || $open < $single ) && ( false === $double || $open < $double ) ) {
|
|
// $attr like '[shortcode]' or 'name = [shortcode]' implies unfiltered_html.
|
|
// In this specific situation we assume KSES did not run because the input
|
|
// was written by an administrator, so we should avoid changing the output
|
|
// and we do not need to run KSES here.
|
|
$attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr );
|
|
} else {
|
|
// $attr like 'name = "[shortcode]"' or "name = '[shortcode]'"
|
|
// We do not know if $content was unfiltered. Assume KSES ran before shortcodes.
|
|
$count = 0;
|
|
$new_attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr, -1, $count );
|
|
if ( $count > 0 ) {
|
|
// Sanitize the shortcode output using KSES.
|
|
$new_attr = wp_kses_one_attr( $new_attr, $elname );
|
|
if ( '' !== $new_attr ) {
|
|
// The shortcode is safe to use now.
|
|
$attr = $new_attr;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$element = $front . implode( '', $attributes ) . $back;
|
|
|
|
// Now encode any remaining [ or ] chars.
|
|
$element = strtr( $element, $trans );
|
|
}
|
|
|
|
$content = implode( '', $textarr );
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Remove placeholders added by do_shortcodes_in_html_tags().
|
|
*
|
|
* @since 4.2.3
|
|
*
|
|
* @param string $content Content to search for placeholders.
|
|
* @return string Content with placeholders removed.
|
|
*/
|
|
function unescape_invalid_shortcodes( $content ) {
|
|
// Clean up entire string, avoids re-parsing HTML.
|
|
$trans = array( '[' => '[', ']' => ']' );
|
|
$content = strtr( $content, $trans );
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Retrieve all attributes from the shortcodes tag.
|
|
*
|
|
* The attributes list has the attribute name as the key and the value of the
|
|
* attribute as the value in the key/value pair. This allows for easier
|
|
* retrieval of the attributes, since all attributes have to be known.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param string $text
|
|
* @return array List of attributes and their value.
|
|
*/
|
|
function shortcode_parse_atts($text) {
|
|
$atts = array();
|
|
$pattern = '/(\w+)\s*=\s*"([^"]*)"(?:\s|$)|(\w+)\s*=\s*\'([^\']*)\'(?:\s|$)|(\w+)\s*=\s*([^\s\'"]+)(?:\s|$)|"([^"]*)"(?:\s|$)|(\S+)(?:\s|$)/';
|
|
$text = preg_replace("/[\x{00a0}\x{200b}]+/u", " ", $text);
|
|
if ( preg_match_all($pattern, $text, $match, PREG_SET_ORDER) ) {
|
|
foreach ($match as $m) {
|
|
if (!empty($m[1]))
|
|
$atts[strtolower($m[1])] = stripcslashes($m[2]);
|
|
elseif (!empty($m[3]))
|
|
$atts[strtolower($m[3])] = stripcslashes($m[4]);
|
|
elseif (!empty($m[5]))
|
|
$atts[strtolower($m[5])] = stripcslashes($m[6]);
|
|
elseif (isset($m[7]) and strlen($m[7]))
|
|
$atts[] = stripcslashes($m[7]);
|
|
elseif (isset($m[8]))
|
|
$atts[] = stripcslashes($m[8]);
|
|
}
|
|
|
|
// Reject any unclosed HTML elements
|
|
foreach( $atts as &$value ) {
|
|
if ( false !== strpos( $value, '<' ) ) {
|
|
if ( 1 !== preg_match( '/^[^<]*+(?:<[^>]*+>[^<]*+)*+$/', $value ) ) {
|
|
$value = '';
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
$atts = ltrim($text);
|
|
}
|
|
return $atts;
|
|
}
|
|
|
|
/**
|
|
* Combine user attributes with known attributes and fill in defaults when needed.
|
|
*
|
|
* The pairs should be considered to be all of the attributes which are
|
|
* supported by the caller and given as a list. The returned attributes will
|
|
* only contain the attributes in the $pairs list.
|
|
*
|
|
* If the $atts list has unsupported attributes, then they will be ignored and
|
|
* removed from the final returned list.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param array $pairs Entire list of supported attributes and their defaults.
|
|
* @param array $atts User defined attributes in shortcode tag.
|
|
* @param string $shortcode Optional. The name of the shortcode, provided for context to enable filtering
|
|
* @return array Combined and filtered attribute list.
|
|
*/
|
|
function shortcode_atts( $pairs, $atts, $shortcode = '' ) {
|
|
$atts = (array)$atts;
|
|
$out = array();
|
|
foreach($pairs as $name => $default) {
|
|
if ( array_key_exists($name, $atts) )
|
|
$out[$name] = $atts[$name];
|
|
else
|
|
$out[$name] = $default;
|
|
}
|
|
/**
|
|
* Filter a shortcode's default attributes.
|
|
*
|
|
* If the third parameter of the shortcode_atts() function is present then this filter is available.
|
|
* The third parameter, $shortcode, is the name of the shortcode.
|
|
*
|
|
* @since 3.6.0
|
|
*
|
|
* @param array $out The output array of shortcode attributes.
|
|
* @param array $pairs The supported attributes and their defaults.
|
|
* @param array $atts The user defined shortcode attributes.
|
|
*/
|
|
if ( $shortcode )
|
|
$out = apply_filters( "shortcode_atts_{$shortcode}", $out, $pairs, $atts );
|
|
|
|
return $out;
|
|
}
|
|
|
|
/**
|
|
* Remove all shortcode tags from the given content.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @uses $shortcode_tags
|
|
*
|
|
* @param string $content Content to remove shortcode tags.
|
|
* @return string Content without shortcode tags.
|
|
*/
|
|
function strip_shortcodes( $content ) {
|
|
global $shortcode_tags;
|
|
|
|
if ( false === strpos( $content, '[' ) ) {
|
|
return $content;
|
|
}
|
|
|
|
if (empty($shortcode_tags) || !is_array($shortcode_tags))
|
|
return $content;
|
|
|
|
$content = do_shortcodes_in_html_tags( $content, true );
|
|
|
|
$pattern = get_shortcode_regex();
|
|
$content = preg_replace_callback( "/$pattern/s", 'strip_shortcode_tag', $content );
|
|
|
|
// Always restore square braces so we don't break things like <!--[if IE ]>
|
|
$content = unescape_invalid_shortcodes( $content );
|
|
|
|
return $content;
|
|
}
|
|
|
|
function strip_shortcode_tag( $m ) {
|
|
// allow [[foo]] syntax for escaping a tag
|
|
if ( $m[1] == '[' && $m[6] == ']' ) {
|
|
return substr($m[0], 1, -1);
|
|
}
|
|
|
|
return $m[1] . $m[6];
|
|
}
|
|
|
|
add_filter('the_content', 'do_shortcode', 11); // AFTER wpautop()
|