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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 3728 | if ( ! $last_changed ) { |
| 3729 | $last_changed = microtime(); |
| 3730 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
| 3731 | } |
| 3732 | |
| 3733 | $cache_key = "get_pages:$key:$last_changed"; |
| 3734 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
| 3735 | // Convert to WP_Post instances |
| 3736 | $pages = array_map( 'get_post', $cache ); |
| 3737 | $pages = apply_filters('get_pages', $pages, $r); |
| 3738 | return $pages; |
| 3739 | } |
| 3740 | |
| 3741 | if ( !is_array($cache) ) |
| 3742 | $cache = array(); |
| 3743 | |
| 3744 | $inclusions = ''; |
| 3745 | if ( ! empty( $include ) ) { |
| 3746 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
| Line | Code |
| 3858 | $query .= $author_query; |
| 3859 | $query .= " ORDER BY " . $sort_column . " " . $sort_order ; |
| 3860 | |
| 3861 | if ( !empty($number) ) |
| 3862 | $query .= ' LIMIT ' . $offset . ',' . $number; |
| 3863 | |
| 3864 | $pages = $wpdb->get_results($query); |
| 3865 | |
| 3866 | if ( empty($pages) ) { |
| 3867 | $pages = apply_filters('get_pages', array(), $r); |
| 3868 | return $pages; |
| 3869 | } |
| 3870 | |
| 3871 | // Sanitize before caching so it'll only get done once |
| 3872 | $num_pages = count($pages); |
| 3873 | for ($i = 0; $i < $num_pages; $i++) { |
| 3874 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
| 3875 | } |
| 3876 | |
| Line | Code |
| 3897 | $page_structure = array(); |
| 3898 | foreach ( $pages as $page ) |
| 3899 | $page_structure[] = $page->ID; |
| 3900 | |
| 3901 | wp_cache_set( $cache_key, $page_structure, 'posts' ); |
| 3902 | |
| 3903 | // Convert to WP_Post instances |
| 3904 | $pages = array_map( 'get_post', $pages ); |
| 3905 | |
| 3906 | $pages = apply_filters('get_pages', $pages, $r); |
| 3907 | |
| 3908 | return $pages; |
| 3909 | } |
| 3910 | |
| 3911 | // |
| 3912 | // Attachment functions |
| 3913 | // |
| 3914 | |
| 3915 | /** |