How to trigger 404 for custom query var?
There is an action specifically for this: function my_parse_query( $wp_query ) { if ( $wp_query->get( ‘my_custom_var’ ) > 42 ) { $wp_query->set_404(); status_header( 404 ); } } add_action( ‘parse_query’, ‘my_parse_query’ ); That should load the 404.php template in your theme, if you have it. Otherwise, it will fall back to index.php. This will also trigger … Read more