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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 |
|---|---|
| 2935 | $id = (int) $id; |
| 2936 | |
| 2937 | wp_cache_delete($id, 'posts'); |
| 2938 | wp_cache_delete($id, 'post_meta'); |
| 2939 | |
| 2940 | clean_object_term_cache($id, 'post'); |
| 2941 | |
| 2942 | wp_cache_delete( 'wp_get_archives', 'general' ); |
| 2943 | |
| 2944 | do_action('clean_post_cache', $id); |
| 2945 | |
| 2946 | if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) { |
| 2947 | foreach( $children as $cid ) |
| 2948 | clean_post_cache( $cid ); |
| 2949 | } |
| 2950 | } |
| 2951 | |
| 2952 | /** |
| 2953 | * Alias of update_post_cache(). |