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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 |
|---|---|
| 3615 | if ( ! $last_changed ) { |
| 3616 | $last_changed = microtime(); |
| 3617 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
| 3618 | } |
| 3619 | |
| 3620 | $cache_key = "get_pages:$key:$last_changed"; |
| 3621 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
| 3622 | // Convert to WP_Post instances |
| 3623 | $pages = array_map( 'get_post', $cache ); |
| 3624 | $pages = apply_filters('get_pages', $pages, $r); |
| 3625 | return $pages; |
| 3626 | } |
| 3627 | |
| 3628 | if ( !is_array($cache) ) |
| 3629 | $cache = array(); |
| 3630 | |
| 3631 | $inclusions = ''; |
| 3632 | if ( !empty($include) ) { |
| 3633 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
| Line | Code |
| 3756 | $query .= $author_query; |
| 3757 | $query .= " ORDER BY " . $sort_column . " " . $sort_order ; |
| 3758 | |
| 3759 | if ( !empty($number) ) |
| 3760 | $query .= ' LIMIT ' . $offset . ',' . $number; |
| 3761 | |
| 3762 | $pages = $wpdb->get_results($query); |
| 3763 | |
| 3764 | if ( empty($pages) ) { |
| 3765 | $pages = apply_filters('get_pages', array(), $r); |
| 3766 | return $pages; |
| 3767 | } |
| 3768 | |
| 3769 | // Sanitize before caching so it'll only get done once |
| 3770 | $num_pages = count($pages); |
| 3771 | for ($i = 0; $i < $num_pages; $i++) { |
| 3772 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
| 3773 | } |
| 3774 | |
| Line | Code |
| 3795 | $page_structure = array(); |
| 3796 | foreach ( $pages as $page ) |
| 3797 | $page_structure[] = $page->ID; |
| 3798 | |
| 3799 | wp_cache_set( $cache_key, $page_structure, 'posts' ); |
| 3800 | |
| 3801 | // Convert to WP_Post instances |
| 3802 | $pages = array_map( 'get_post', $pages ); |
| 3803 | |
| 3804 | $pages = apply_filters('get_pages', $pages, $r); |
| 3805 | |
| 3806 | return $pages; |
| 3807 | } |
| 3808 | |
| 3809 | // |
| 3810 | // Attachment functions |
| 3811 | // |
| 3812 | |
| 3813 | /** |