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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 |
|---|---|
| 2802 | $id = (int) $id; |
| 2803 | |
| 2804 | wp_cache_delete($id, 'posts'); |
| 2805 | wp_cache_delete($id, 'post_meta'); |
| 2806 | |
| 2807 | clean_object_term_cache($id, 'post'); |
| 2808 | |
| 2809 | wp_cache_delete( 'wp_get_archives', 'general' ); |
| 2810 | |
| 2811 | do_action('clean_post_cache', $id); |
| 2812 | |
| 2813 | if ( $children = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = %d", $id) ) ) { |
| 2814 | foreach( $children as $cid ) |
| 2815 | clean_post_cache( $cid ); |
| 2816 | } |
| 2817 | } |
| 2818 | |
| 2819 | /** |
| 2820 | * update_page_cache() - Alias of update_post_cache() |