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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 |
|---|---|
| 522 | * @uses $wpdb |
| 523 | * @uses do_action() Calls 'delete_comment' hook on comment ID |
| 524 | * @uses do_action() Calls 'wp_set_comment_status' hook on comment ID with 'delete' set for the second parameter |
| 525 | * |
| 526 | * @param int $comment_id Comment ID |
| 527 | * @return bool False if delete comment query failure, true on success |
| 528 | */ |
| 529 | function wp_delete_comment($comment_id) { |
| 530 | global $wpdb; |
| 531 | do_action('delete_comment', $comment_id); |
| 532 | |
| 533 | $comment = get_comment($comment_id); |
| 534 | |
| 535 | if ( ! $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->comments WHERE comment_ID = %d LIMIT 1", $comment_id) ) ) |
| 536 | return false; |
| 537 | |
| 538 | $post_id = $comment->comment_post_ID; |
| 539 | if ( $post_id && $comment->comment_approved == 1 ) |
| 540 | wp_update_comment_count($post_id); |