wp_is_jsonp_request example

        $callback = apply_filters( 'wp_die_ajax_handler', '_ajax_wp_die_handler' );
    } elseif ( wp_is_json_request() ) {
        /** * Filters the callback for killing WordPress execution for JSON requests. * * @since 5.1.0 * * @param callable $callback Callback function name. */
        $callback = apply_filters( 'wp_die_json_handler', '_json_wp_die_handler' );
    } elseif ( defined( 'REST_REQUEST' ) && REST_REQUEST && wp_is_jsonp_request() ) {
        /** * Filters the callback for killing WordPress execution for JSONP REST requests. * * @since 5.2.0 * * @param callable $callback Callback function name. */
        $callback = apply_filters( 'wp_die_jsonp_handler', '_jsonp_wp_die_handler' );
    } elseif ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) {
        /** * Filters the callback for killing WordPress execution for XML-RPC requests. * * @since 3.4.0 * * @param callable $callback Callback function name. */