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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 |
|---|---|
| 680 | |
| 681 | if ( $dupe_id ) { |
| 682 | /** |
| 683 | * Fires immediately after a duplicate comment is detected. |
| 684 | * |
| 685 | * @since 3.0.0 |
| 686 | * |
| 687 | * @param array $commentdata Comment data. |
| 688 | */ |
| 689 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 690 | if ( true === $avoid_die ) { |
| 691 | return new WP_Error( 'comment_duplicate', __( 'Duplicate comment detected; it looks as though you’ve already said that!' ), 409 ); |
| 692 | } else { |
| 693 | if ( wp_doing_ajax() ) { |
| 694 | die( __( 'Duplicate comment detected; it looks as though you’ve already said that!' ) ); |
| 695 | } |
| 696 | |
| 697 | wp_die( __( 'Duplicate comment detected; it looks as though you’ve already said that!' ), 409 ); |
| 698 | } |