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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 |
|---|---|
| 4463 | $last_changed = microtime(); |
| 4464 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
| 4465 | } |
| 4466 | |
| 4467 | $cache_key = "get_pages:$key:$last_changed"; |
| 4468 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
| 4469 | // Convert to WP_Post instances. |
| 4470 | $pages = array_map( 'get_post', $cache ); |
| 4471 | /** This filter is documented in wp-includes/post.php */ |
| 4472 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4473 | return $pages; |
| 4474 | } |
| 4475 | |
| 4476 | $inclusions = ''; |
| 4477 | if ( ! empty( $r['include'] ) ) { |
| 4478 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
| 4479 | $parent = -1; |
| 4480 | $exclude = ''; |
| 4481 | $meta_key = ''; |
| Line | Code |
| 4605 | |
| 4606 | if ( ! empty( $number ) ) { |
| 4607 | $query .= ' LIMIT ' . $offset . ',' . $number; |
| 4608 | } |
| 4609 | |
| 4610 | $pages = $wpdb->get_results($query); |
| 4611 | |
| 4612 | if ( empty($pages) ) { |
| 4613 | /** This filter is documented in wp-includes/post.php */ |
| 4614 | $pages = apply_filters( 'get_pages', array(), $r ); |
| 4615 | return $pages; |
| 4616 | } |
| 4617 | |
| 4618 | // Sanitize before caching so it'll only get done once. |
| 4619 | $num_pages = count($pages); |
| 4620 | for ($i = 0; $i < $num_pages; $i++) { |
| 4621 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
| 4622 | } |
| 4623 | |
| Line | Code |
| 4657 | |
| 4658 | /** |
| 4659 | * Filter the retrieved list of pages. |
| 4660 | * |
| 4661 | * @since 2.1.0 |
| 4662 | * |
| 4663 | * @param array $pages List of pages to retrieve. |
| 4664 | * @param array $r Array of get_pages() arguments. |
| 4665 | */ |
| 4666 | $pages = apply_filters( 'get_pages', $pages, $r ); |
| 4667 | |
| 4668 | return $pages; |
| 4669 | } |
| 4670 | |
| 4671 | // |
| 4672 | // Attachment functions |
| 4673 | // |
| 4674 | |
| 4675 | /** |