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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 |
|---|---|
| 1728 | return wp_trash_comment($comment_id); |
| 1729 | |
| 1730 | /** |
| 1731 | * Fires immediately before a comment is deleted from the database. |
| 1732 | * |
| 1733 | * @since 1.2.0 |
| 1734 | * |
| 1735 | * @param int $comment_id The comment ID. |
| 1736 | */ |
| 1737 | do_action( 'delete_comment', $comment_id ); |
| 1738 | |
| 1739 | // Move children up a level. |
| 1740 | $children = $wpdb->get_col( $wpdb->prepare("SELECT comment_ID FROM $wpdb->comments WHERE comment_parent = %d", $comment_id) ); |
| 1741 | if ( !empty($children) ) { |
| 1742 | $wpdb->update($wpdb->comments, array('comment_parent' => $comment->comment_parent), array('comment_parent' => $comment_id)); |
| 1743 | clean_comment_cache($children); |
| 1744 | } |
| 1745 | |
| 1746 | // Delete metadata |