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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 |
|---|---|
| 627 | |
| 628 | if ( $dupe_id ) { |
| 629 | /** |
| 630 | * Fires immediately after a duplicate comment is detected. |
| 631 | * |
| 632 | * @since 3.0.0 |
| 633 | * |
| 634 | * @param array $commentdata Comment data. |
| 635 | */ |
| 636 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 637 | if ( defined( 'DOING_AJAX' ) ) { |
| 638 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 639 | } |
| 640 | wp_die( __( 'Duplicate comment detected; it looks as though you’ve already said that!' ), 409 ); |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * Fires immediately before a comment is marked approved. |
| 645 | * |