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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 |
|---|---|
| 659 | |
| 660 | if ( $dupe_id ) { |
| 661 | /** |
| 662 | * Fires immediately after a duplicate comment is detected. |
| 663 | * |
| 664 | * @since 3.0.0 |
| 665 | * |
| 666 | * @param array $commentdata Comment data. |
| 667 | */ |
| 668 | do_action( 'comment_duplicate_trigger', $commentdata ); |
| 669 | if ( true === $avoid_die ) { |
| 670 | return new WP_Error( 'comment_duplicate', __( 'Duplicate comment detected; it looks as though you’ve already said that!' ), 409 ); |
| 671 | } else { |
| 672 | if ( wp_doing_ajax() ) { |
| 673 | die( __('Duplicate comment detected; it looks as though you’ve already said that!') ); |
| 674 | } |
| 675 | |
| 676 | wp_die( __( 'Duplicate comment detected; it looks as though you’ve already said that!' ), 409 ); |
| 677 | } |