}
$args = explode("/", $request);
$controller = $args[0];
if ($controller == "driver") {
    $driverCon = new DriverController($request, $method);
    $driverCon->resolve();
} else {
    if ($controller == "user") {
    } else {
        if ($controller == "admin") {
            $adminCon = new AdminController($request, $method);
            $adminCon->resolve();
        } else {
            if ($controller == "validate") {
                $validCon = new ValidationController($request, $method);
                $validCon->resolve();
            } else {
                if ($controller == "mail") {
                    $mailCon = new MailController($request, $method);
                    $mailCon->resolve();
                } else {
                    header('HTTP/1.1 400 Bad Request');
                    header('Content-Type: text/xml; charset=UTF-8');
                    echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
                    echo "<error>\n";
                    echo "<reason>Undefined API</reason>\n";
                    echo "<description>Kindly refer Ride on Bike API documentation</description>\n";
                    echo "</error>";
                    return;
                }
            }