How to send mail dynamic parameter email in content using Laravel?

           $url_str = $request->account_name . ".sgkid.com/";

           $objDemo = new \stdClass();
           $objDemo->firstname = $request->first_name;
           $objDemo->account_name = $request->account_name;
           $objDemo->title = 'Registration Information';
           $objDemo->username = $request->username;
           $objDemo->password = $password;
           $objDemo->url = URL('/');

           $objTmp = new \stdClass();
           $objTmp->firstname = $request->first_name;
           $objTmp->account_name = $request->account_name;
           $objTmp->title = 'Booking Registration Information';
           $objTmp->username = $request->username;
           $objTmp->password = $password;
           $objTmp->url = prep_url($url_str);

           Mail::to($request->email)->send(new BookingRegistration($objTmp));
           Mail::to($request->email)->send(new AccountRegistration($objDemo));

I have create send mail in Laravel. on objDemo working well. but for ObjTmp not working maybe the parameter $url_str have any "." value make it not working .

via Chebli Mohamed