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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.
| Line | Code |
|---|---|
| 4721 | wp_cache_delete( 'wp_get_archives', 'general' ); |
| 4722 | |
| 4723 | do_action( 'clean_post_cache', $post->ID, $post ); |
| 4724 | |
| 4725 | if ( is_post_type_hierarchical( $post->post_type ) ) |
| 4726 | wp_cache_delete( 'get_pages', 'posts' ); |
| 4727 | |
| 4728 | if ( 'page' == $post->post_type ) { |
| 4729 | wp_cache_delete( 'all_page_ids', 'posts' ); |
| 4730 | do_action( 'clean_page_cache', $post->ID ); |
| 4731 | } |
| 4732 | |
| 4733 | wp_cache_set( 'last_changed', microtime(), 'posts' ); |
| 4734 | } |
| 4735 | |
| 4736 | /** |
| 4737 | * Call major cache updating functions for list of Post objects. |
| 4738 | * |
| 4739 | * @package WordPress |