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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 |
---|---|
719 | do_action( 'comment_duplicate_trigger', $commentdata ); |
720 |
|
721 | /** |
722 | * Filters duplicate comment error message. |
723 | * |
724 | * @since 5.2.0 |
725 | * |
726 | * @param string $comment_duplicate_message Duplicate comment error message. |
727 | */ |
728 | $comment_duplicate_message = apply_filters( 'comment_duplicate_message', __( 'Duplicate comment detected; it looks as though you’ve already said that!' ) ); |
729 |
|
730 | if ( $wp_error ) { |
731 | return new WP_Error( 'comment_duplicate', $comment_duplicate_message, 409 ); |
732 | } else { |
733 | if ( wp_doing_ajax() ) { |
734 | die( $comment_duplicate_message ); |
735 | } |
736 |
|
737 | wp_die( $comment_duplicate_message, 409 ); |