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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 |
---|---|
4549 | $last_changed = microtime(); |
4550 | wp_cache_set( 'last_changed', $last_changed, 'posts' ); |
4551 | } |
4552 |
|
4553 | $cache_key = "get_pages:$key:$last_changed"; |
4554 | if ( $cache = wp_cache_get( $cache_key, 'posts' ) ) { |
4555 | // Convert to WP_Post instances. |
4556 | $pages = array_map( 'get_post', $cache ); |
4557 | /** This filter is documented in wp-includes/post.php */ |
4558 | $pages = apply_filters( 'get_pages', $pages, $r ); |
4559 | return $pages; |
4560 | } |
4561 |
|
4562 | $inclusions = ''; |
4563 | if ( ! empty( $r['include'] ) ) { |
4564 | $child_of = 0; //ignore child_of, parent, exclude, meta_key, and meta_value params if using include |
4565 | $parent = -1; |
4566 | $exclude = ''; |
4567 | $meta_key = ''; |
Line | Code |
4691 |
|
4692 | if ( ! empty( $number ) ) { |
4693 | $query .= ' LIMIT ' . $offset . ',' . $number; |
4694 | } |
4695 |
|
4696 | $pages = $wpdb->get_results($query); |
4697 |
|
4698 | if ( empty($pages) ) { |
4699 | /** This filter is documented in wp-includes/post.php */ |
4700 | $pages = apply_filters( 'get_pages', array(), $r ); |
4701 | return $pages; |
4702 | } |
4703 |
|
4704 | // Sanitize before caching so it'll only get done once. |
4705 | $num_pages = count($pages); |
4706 | for ($i = 0; $i < $num_pages; $i++) { |
4707 | $pages[$i] = sanitize_post($pages[$i], 'raw'); |
4708 | } |
4709 |
|
Line | Code |
4743 |
|
4744 | /** |
4745 | * Filter the retrieved list of pages. |
4746 | * |
4747 | * @since 2.1.0 |
4748 | * |
4749 | * @param array $pages List of pages to retrieve. |
4750 | * @param array $r Array of get_pages() arguments. |
4751 | */ |
4752 | return apply_filters( 'get_pages', $pages, $r ); |
4753 | } |
4754 |
|
4755 | // |
4756 | // Attachment functions |
4757 | // |
4758 |
|
4759 | /** |
4760 | * Check if the attachment URI is local one and is really an attachment. |
4761 | * |