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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 |
|---|---|
| 4380 | clean_object_term_cache( $post->ID, $post->post_type ); |
| 4381 | |
| 4382 | wp_cache_delete( 'wp_get_archives', 'general' ); |
| 4383 | |
| 4384 | do_action( 'clean_post_cache', $post->ID, $post ); |
| 4385 | |
| 4386 | if ( 'page' == $post->post_type ) { |
| 4387 | wp_cache_delete( 'all_page_ids', 'posts' ); |
| 4388 | wp_cache_delete( 'get_pages', 'posts' ); |
| 4389 | do_action( 'clean_page_cache', $post->ID ); |
| 4390 | } |
| 4391 | |
| 4392 | if ( $children = $wpdb->get_results( $wpdb->prepare("SELECT ID, post_type FROM $wpdb->posts WHERE post_parent = %d", $post->ID) ) ) { |
| 4393 | foreach ( $children as $child ) { |
| 4394 | // Loop detection |
| 4395 | if ( $child->ID == $post->ID ) |
| 4396 | continue; |
| 4397 | clean_post_cache( $child ); |
| 4398 | } |