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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 |
|---|---|
| 1567 | $old = (int) $post->comment_count; |
| 1568 | $new = (int) $wpdb->get_var( $wpdb->prepare("SELECT COUNT(*) FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1'", $post_id) ); |
| 1569 | $wpdb->update( $wpdb->posts, array('comment_count' => $new), array('ID' => $post_id) ); |
| 1570 | |
| 1571 | if ( 'page' == $post->post_type ) |
| 1572 | clean_page_cache( $post_id ); |
| 1573 | else |
| 1574 | clean_post_cache( $post_id ); |
| 1575 | |
| 1576 | do_action('wp_update_comment_count', $post_id, $new, $old); |
| 1577 | do_action('edit_post', $post_id, $post); |
| 1578 | |
| 1579 | return true; |
| 1580 | } |
| 1581 | |
| 1582 | // |
| 1583 | // Ping and trackback functions. |
| 1584 | // |
| 1585 | |