Set custom server protocol in wordpress

function check_broken_link() {

global $wpdb;

$table_name = $wpdb->prefix . 'bad_urls';

$current_url = $_SERVER['REQUEST_URI'];

$result = $wpdb->get_row("SELECT * FROM $table_name WHERE url = '$current_url'");

if ($result) {

// Send "410 Gone" header

header($_SERVER["SERVER_PROTOCOL"] . " 410 Gone");

exit();

}

}

add_action('template_redirect', 'check_broken_link');