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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 |
|---|---|
| 1288 | return wp_trash_comment($comment_id); |
| 1289 | |
| 1290 | /** |
| 1291 | * Fires immediately before a comment is deleted from the database. |
| 1292 | * |
| 1293 | * @since 1.2.0 |
| 1294 | * |
| 1295 | * @param int $comment_id The comment ID. |
| 1296 | */ |
| 1297 | do_action( 'delete_comment', $comment->comment_ID ); |
| 1298 | |
| 1299 | // Move children up a level. |
| 1300 | $children = $wpdb->get_col( $wpdb->prepare("SELECT comment_ID FROM $wpdb->comments WHERE comment_parent = %d", $comment->comment_ID) ); |
| 1301 | if ( !empty($children) ) { |
| 1302 | $wpdb->update($wpdb->comments, array('comment_parent' => $comment->comment_parent), array('comment_parent' => $comment->comment_ID)); |
| 1303 | clean_comment_cache($children); |
| 1304 | } |
| 1305 | |
| 1306 | // Delete metadata |