mirror of
https://github.com/WordPress/WordPress.git
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a71d208785
WordPress has historically often used code like `preg_split( '/[\s,]+/', $var )` to parse a string of comma-separated values into an array. However, this approach was causing an empty string to not be parsed into an empty array as expected, but rather into an array with the empty string as its sole element. This was among other areas causing problems in the REST API where passing an empty request parameter could cause that request to fail because, instead of it being ignored, that parameter would be compared against the valid values for it, which typically do not include an empty string. Props david.binda, sstoqnov. Fixes #43977. Built from https://develop.svn.wordpress.org/trunk@44546 git-svn-id: http://core.svn.wordpress.org/trunk@44377 1a063a9b-81f0-0310-95a4-ce76da25c4cd
449 lines
14 KiB
PHP
449 lines
14 KiB
PHP
<?php
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/**
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* Link/Bookmark API
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*
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* @package WordPress
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* @subpackage Bookmark
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*/
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/**
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* Retrieve Bookmark data
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*
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* @since 2.1.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param int|stdClass $bookmark
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* @param string $output Optional. The required return type. One of OBJECT, ARRAY_A, or ARRAY_N, which correspond to
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* an stdClass object, an associative array, or a numeric array, respectively. Default OBJECT.
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* @param string $filter Optional, default is 'raw'.
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* @return array|object|null Type returned depends on $output value.
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*/
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function get_bookmark( $bookmark, $output = OBJECT, $filter = 'raw' ) {
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global $wpdb;
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if ( empty( $bookmark ) ) {
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if ( isset( $GLOBALS['link'] ) ) {
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$_bookmark = & $GLOBALS['link'];
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} else {
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$_bookmark = null;
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}
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} elseif ( is_object( $bookmark ) ) {
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wp_cache_add( $bookmark->link_id, $bookmark, 'bookmark' );
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$_bookmark = $bookmark;
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} else {
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if ( isset( $GLOBALS['link'] ) && ( $GLOBALS['link']->link_id == $bookmark ) ) {
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$_bookmark = & $GLOBALS['link'];
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} elseif ( ! $_bookmark = wp_cache_get( $bookmark, 'bookmark' ) ) {
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$_bookmark = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->links WHERE link_id = %d LIMIT 1", $bookmark ) );
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if ( $_bookmark ) {
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$_bookmark->link_category = array_unique( wp_get_object_terms( $_bookmark->link_id, 'link_category', array( 'fields' => 'ids' ) ) );
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wp_cache_add( $_bookmark->link_id, $_bookmark, 'bookmark' );
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}
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}
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}
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if ( ! $_bookmark ) {
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return $_bookmark;
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}
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$_bookmark = sanitize_bookmark( $_bookmark, $filter );
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if ( $output == OBJECT ) {
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return $_bookmark;
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} elseif ( $output == ARRAY_A ) {
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return get_object_vars( $_bookmark );
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} elseif ( $output == ARRAY_N ) {
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return array_values( get_object_vars( $_bookmark ) );
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} else {
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return $_bookmark;
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}
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}
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/**
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* Retrieve single bookmark data item or field.
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*
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* @since 2.3.0
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*
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* @param string $field The name of the data field to return
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* @param int $bookmark The bookmark ID to get field
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* @param string $context Optional. The context of how the field will be used.
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* @return string|WP_Error
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*/
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function get_bookmark_field( $field, $bookmark, $context = 'display' ) {
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$bookmark = (int) $bookmark;
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$bookmark = get_bookmark( $bookmark );
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if ( is_wp_error( $bookmark ) ) {
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return $bookmark;
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}
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if ( ! is_object( $bookmark ) ) {
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return '';
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}
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if ( ! isset( $bookmark->$field ) ) {
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return '';
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}
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return sanitize_bookmark_field( $field, $bookmark->$field, $bookmark->link_id, $context );
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}
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/**
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* Retrieves the list of bookmarks
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*
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* Attempts to retrieve from the cache first based on MD5 hash of arguments. If
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* that fails, then the query will be built from the arguments and executed. The
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* results will be stored to the cache.
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*
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* @since 2.1.0
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param string|array $args {
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* Optional. String or array of arguments to retrieve bookmarks.
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*
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* @type string $orderby How to order the links by. Accepts post fields. Default 'name'.
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* @type string $order Whether to order bookmarks in ascending or descending order.
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* Accepts 'ASC' (ascending) or 'DESC' (descending). Default 'ASC'.
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* @type int $limit Amount of bookmarks to display. Accepts 1+ or -1 for all.
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* Default -1.
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* @type string $category Comma-separated list of category ids to include links from.
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* Default empty.
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* @type string $category_name Category to retrieve links for by name. Default empty.
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* @type int|bool $hide_invisible Whether to show or hide links marked as 'invisible'. Accepts
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* 1|true or 0|false. Default 1|true.
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* @type int|bool $show_updated Whether to display the time the bookmark was last updated.
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* Accepts 1|true or 0|false. Default 0|false.
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* @type string $include Comma-separated list of bookmark IDs to include. Default empty.
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* @type string $exclude Comma-separated list of bookmark IDs to exclude. Default empty.
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* }
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* @return array List of bookmark row objects.
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*/
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function get_bookmarks( $args = '' ) {
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global $wpdb;
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$defaults = array(
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'orderby' => 'name',
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'order' => 'ASC',
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'limit' => -1,
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'category' => '',
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'category_name' => '',
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'hide_invisible' => 1,
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'show_updated' => 0,
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'include' => '',
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'exclude' => '',
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'search' => '',
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);
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$r = wp_parse_args( $args, $defaults );
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$key = md5( serialize( $r ) );
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$cache = false;
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if ( 'rand' !== $r['orderby'] && $cache = wp_cache_get( 'get_bookmarks', 'bookmark' ) ) {
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if ( is_array( $cache ) && isset( $cache[ $key ] ) ) {
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$bookmarks = $cache[ $key ];
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/**
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* Filters the returned list of bookmarks.
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*
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* The first time the hook is evaluated in this file, it returns the cached
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* bookmarks list. The second evaluation returns a cached bookmarks list if the
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* link category is passed but does not exist. The third evaluation returns
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* the full cached results.
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*
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* @since 2.1.0
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*
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* @see get_bookmarks()
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*
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* @param array $bookmarks List of the cached bookmarks.
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* @param array $r An array of bookmark query arguments.
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*/
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return apply_filters( 'get_bookmarks', $bookmarks, $r );
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}
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}
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if ( ! is_array( $cache ) ) {
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$cache = array();
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}
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$inclusions = '';
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if ( ! empty( $r['include'] ) ) {
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$r['exclude'] = ''; //ignore exclude, category, and category_name params if using include
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$r['category'] = '';
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$r['category_name'] = '';
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$inclinks = wp_parse_id_list( $r['include'] );
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if ( count( $inclinks ) ) {
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foreach ( $inclinks as $inclink ) {
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if ( empty( $inclusions ) ) {
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$inclusions = ' AND ( link_id = ' . $inclink . ' ';
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} else {
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$inclusions .= ' OR link_id = ' . $inclink . ' ';
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}
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}
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}
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}
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if ( ! empty( $inclusions ) ) {
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$inclusions .= ')';
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}
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$exclusions = '';
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if ( ! empty( $r['exclude'] ) ) {
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$exlinks = wp_parse_id_list( $r['exclude'] );
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if ( count( $exlinks ) ) {
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foreach ( $exlinks as $exlink ) {
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if ( empty( $exclusions ) ) {
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$exclusions = ' AND ( link_id <> ' . $exlink . ' ';
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} else {
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$exclusions .= ' AND link_id <> ' . $exlink . ' ';
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}
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}
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}
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}
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if ( ! empty( $exclusions ) ) {
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$exclusions .= ')';
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}
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if ( ! empty( $r['category_name'] ) ) {
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if ( $r['category'] = get_term_by( 'name', $r['category_name'], 'link_category' ) ) {
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$r['category'] = $r['category']->term_id;
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} else {
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$cache[ $key ] = array();
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wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
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/** This filter is documented in wp-includes/bookmark.php */
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return apply_filters( 'get_bookmarks', array(), $r );
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}
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}
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$search = '';
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if ( ! empty( $r['search'] ) ) {
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$like = '%' . $wpdb->esc_like( $r['search'] ) . '%';
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$search = $wpdb->prepare( ' AND ( (link_url LIKE %s) OR (link_name LIKE %s) OR (link_description LIKE %s) ) ', $like, $like, $like );
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}
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$category_query = '';
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$join = '';
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if ( ! empty( $r['category'] ) ) {
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$incategories = wp_parse_id_list( $r['category'] );
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if ( count( $incategories ) ) {
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foreach ( $incategories as $incat ) {
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if ( empty( $category_query ) ) {
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$category_query = ' AND ( tt.term_id = ' . $incat . ' ';
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} else {
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$category_query .= ' OR tt.term_id = ' . $incat . ' ';
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}
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}
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}
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}
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if ( ! empty( $category_query ) ) {
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$category_query .= ") AND taxonomy = 'link_category'";
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$join = " INNER JOIN $wpdb->term_relationships AS tr ON ($wpdb->links.link_id = tr.object_id) INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_taxonomy_id = tr.term_taxonomy_id";
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}
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if ( $r['show_updated'] ) {
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$recently_updated_test = ', IF (DATE_ADD(link_updated, INTERVAL 120 MINUTE) >= NOW(), 1,0) as recently_updated ';
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} else {
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$recently_updated_test = '';
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}
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$get_updated = ( $r['show_updated'] ) ? ', UNIX_TIMESTAMP(link_updated) AS link_updated_f ' : '';
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$orderby = strtolower( $r['orderby'] );
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$length = '';
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switch ( $orderby ) {
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case 'length':
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$length = ', CHAR_LENGTH(link_name) AS length';
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break;
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case 'rand':
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$orderby = 'rand()';
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break;
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case 'link_id':
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$orderby = "$wpdb->links.link_id";
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break;
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default:
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$orderparams = array();
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$keys = array( 'link_id', 'link_name', 'link_url', 'link_visible', 'link_rating', 'link_owner', 'link_updated', 'link_notes', 'link_description' );
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foreach ( explode( ',', $orderby ) as $ordparam ) {
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$ordparam = trim( $ordparam );
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if ( in_array( 'link_' . $ordparam, $keys ) ) {
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$orderparams[] = 'link_' . $ordparam;
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} elseif ( in_array( $ordparam, $keys ) ) {
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$orderparams[] = $ordparam;
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}
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}
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$orderby = implode( ',', $orderparams );
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}
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if ( empty( $orderby ) ) {
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$orderby = 'link_name';
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}
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$order = strtoupper( $r['order'] );
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if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) {
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$order = 'ASC';
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}
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$visible = '';
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if ( $r['hide_invisible'] ) {
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$visible = "AND link_visible = 'Y'";
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}
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$query = "SELECT * $length $recently_updated_test $get_updated FROM $wpdb->links $join WHERE 1=1 $visible $category_query";
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$query .= " $exclusions $inclusions $search";
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$query .= " ORDER BY $orderby $order";
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if ( $r['limit'] != -1 ) {
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$query .= ' LIMIT ' . $r['limit'];
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}
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$results = $wpdb->get_results( $query );
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if ( 'rand()' !== $orderby ) {
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$cache[ $key ] = $results;
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wp_cache_set( 'get_bookmarks', $cache, 'bookmark' );
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}
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/** This filter is documented in wp-includes/bookmark.php */
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return apply_filters( 'get_bookmarks', $results, $r );
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}
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/**
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* Sanitizes all bookmark fields
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*
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* @since 2.3.0
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*
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* @param stdClass|array $bookmark Bookmark row
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* @param string $context Optional, default is 'display'. How to filter the
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* fields
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* @return stdClass|array Same type as $bookmark but with fields sanitized.
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*/
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function sanitize_bookmark( $bookmark, $context = 'display' ) {
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$fields = array(
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'link_id',
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'link_url',
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'link_name',
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'link_image',
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'link_target',
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'link_category',
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'link_description',
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'link_visible',
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'link_owner',
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'link_rating',
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'link_updated',
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'link_rel',
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'link_notes',
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'link_rss',
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);
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if ( is_object( $bookmark ) ) {
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$do_object = true;
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$link_id = $bookmark->link_id;
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} else {
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$do_object = false;
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$link_id = $bookmark['link_id'];
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}
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foreach ( $fields as $field ) {
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if ( $do_object ) {
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if ( isset( $bookmark->$field ) ) {
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$bookmark->$field = sanitize_bookmark_field( $field, $bookmark->$field, $link_id, $context );
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}
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} else {
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if ( isset( $bookmark[ $field ] ) ) {
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$bookmark[ $field ] = sanitize_bookmark_field( $field, $bookmark[ $field ], $link_id, $context );
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}
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}
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}
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return $bookmark;
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}
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/**
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* Sanitizes a bookmark field.
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*
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* Sanitizes the bookmark fields based on what the field name is. If the field
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* has a strict value set, then it will be tested for that, else a more generic
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* filtering is applied. After the more strict filter is applied, if the `$context`
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* is 'raw' then the value is immediately return.
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*
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* Hooks exist for the more generic cases. With the 'edit' context, the {@see 'edit_$field'}
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* filter will be called and passed the `$value` and `$bookmark_id` respectively.
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*
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* With the 'db' context, the {@see 'pre_$field'} filter is called and passed the value.
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* The 'display' context is the final context and has the `$field` has the filter name
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* and is passed the `$value`, `$bookmark_id`, and `$context`, respectively.
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*
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* @since 2.3.0
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*
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* @param string $field The bookmark field.
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* @param mixed $value The bookmark field value.
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* @param int $bookmark_id Bookmark ID.
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* @param string $context How to filter the field value. Accepts 'raw', 'edit', 'attribute',
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* 'js', 'db', or 'display'
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* @return mixed The filtered value.
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*/
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function sanitize_bookmark_field( $field, $value, $bookmark_id, $context ) {
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switch ( $field ) {
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case 'link_id': // ints
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case 'link_rating':
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$value = (int) $value;
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break;
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case 'link_category': // array( ints )
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$value = array_map( 'absint', (array) $value );
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// We return here so that the categories aren't filtered.
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// The 'link_category' filter is for the name of a link category, not an array of a link's link categories
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return $value;
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case 'link_visible': // bool stored as Y|N
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$value = preg_replace( '/[^YNyn]/', '', $value );
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break;
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case 'link_target': // "enum"
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$targets = array( '_top', '_blank' );
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if ( ! in_array( $value, $targets ) ) {
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$value = '';
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}
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break;
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}
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if ( 'raw' == $context ) {
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return $value;
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}
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if ( 'edit' == $context ) {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( "edit_{$field}", $value, $bookmark_id );
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if ( 'link_notes' == $field ) {
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$value = esc_html( $value ); // textarea_escaped
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} else {
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$value = esc_attr( $value );
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}
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} elseif ( 'db' == $context ) {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( "pre_{$field}", $value );
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} else {
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/** This filter is documented in wp-includes/post.php */
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$value = apply_filters( "{$field}", $value, $bookmark_id, $context );
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if ( 'attribute' == $context ) {
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$value = esc_attr( $value );
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} elseif ( 'js' == $context ) {
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$value = esc_js( $value );
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}
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}
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return $value;
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}
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/**
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* Deletes the bookmark cache.
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*
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* @since 2.7.0
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*
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* @param int $bookmark_id Bookmark ID.
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*/
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function clean_bookmark_cache( $bookmark_id ) {
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wp_cache_delete( $bookmark_id, 'bookmark' );
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wp_cache_delete( 'get_bookmarks', 'bookmark' );
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clean_object_term_cache( $bookmark_id, 'link' );
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}
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