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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 |
|---|---|
| 510 | $wpdb->query("UPDATE $wpdb->posts SET comment_count = '$new' WHERE ID = '$post_id'"); |
| 511 | $comment_count_cache[$post_id] = $new; |
| 512 | |
| 513 | if ( 'page' == $post->post_type ) |
| 514 | clean_page_cache( $post_id ); |
| 515 | else |
| 516 | clean_post_cache( $post_id ); |
| 517 | |
| 518 | do_action('wp_update_comment_count', $post_id, $new, $old); |
| 519 | do_action('edit_post', $post_id, $post); |
| 520 | |
| 521 | return true; |
| 522 | } |
| 523 | |
| 524 | |
| 525 | // |
| 526 | // Ping and trackback functions. |
| 527 | // |
| 528 | |