unable to redirect url

I am trying to redirect url if subdomian is exist .

$link=Request::fullUrl();
        $parsedUrl = parse_url($link);
        $host = explode('.', $parsedUrl['host']);
        $subdomain = $host[0];
        if ($subdomain==true){
            $name =User::where('name', $subdomain)->first();
            //die('error');
            $redi=url('/') . '/?ref=' .$name->id;
           error_reporting(E_ALL | E_WARNING | E_NOTICE);
           ini_set('display_errors', TRUE);
           flush();
           header("Location:https://sanjay.agelesszen.com/".'?ref='.$name->id);
           die('should have redirected by now');
        }
    This Header redirection is working.
    header("Location:https://agelesszen.com/".'?ref='.$name->id);
    But when I am trying this .Its showing many redirection
    header("Location:https://sanjay.agelesszen.com/".'?ref='.$name->id);.

Question is that .can I control this wiht crate route in web.php

Please help me regarding this if any solution is exist Thanks

via Chebli Mohamed