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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 |
|---|---|
| 4510 | $last_changed = microtime(); |
| 4511 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
| 4512 | } |
| 4513 | |
| 4514 | $cache_key = "get_pages:$key:$last_changed"; |
| 4515 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
| 4516 | // Convert to WP_Post instances. |
| 4517 | $pages = array_map( 'get_post', $cache ); |
| 4518 | /** This filter is documented in wp-includes/post.php */ |
| 4519 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4520 | return $pages; |
| 4521 | } |
| 4522 | |
| 4523 | $inclusions = ''; |
| 4524 | if ( ! empty( $r['include'] ) ) { |
| 4525 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
| 4526 | $parent = -1; |
| 4527 | $exclude = ''; |
| 4528 | $meta_key = ''; |
| Line | Code |
| 4652 | |
| 4653 | if ( ! empty( $number ) ) { |
| 4654 | $query .= ' LIMIT ' . $offset . ',' . $number; |
| 4655 | } |
| 4656 | |
| 4657 | $pages = $wpdb->get_results($query); |
| 4658 | |
| 4659 | if ( empty($pages) ) { |
| 4660 | /** This filter is documented in wp-includes/post.php */ |
| 4661 | $pages = apply_filters( 'get_pages', array(), $r ); |
| 4662 | return $pages; |
| 4663 | } |
| 4664 | |
| 4665 | // Sanitize before caching so it'll only get done once. |
| 4666 | $num_pages = count($pages); |
| 4667 | for ($i = 0; $i < $num_pages; $i++) { |
| 4668 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
| 4669 | } |
| 4670 | |
| Line | Code |
| 4704 | |
| 4705 | /** |
| 4706 | * Filter the retrieved list of pages. |
| 4707 | * |
| 4708 | * @since 2.1.0 |
| 4709 | * |
| 4710 | * @param array $pages List of pages to retrieve. |
| 4711 | * @param array $r Array of get_pages() arguments. |
| 4712 | */ |
| 4713 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4714 | |
| 4715 | return $pages; |
| 4716 | } |
| 4717 | |
| 4718 | // |
| 4719 | // Attachment functions |
| 4720 | // |
| 4721 | |
| 4722 | /** |