Does Making a Controller in Laravel stops the php artisan serve to execute?

I was making a controller while the server default localhost:8000 for laravel was on.

After making the controller the server was not working and when i tried command "php artisan serve" in terminal it gave me :-

[Symfony\Component\Debug\Exception\FatalErrorException]
parse error

What Should i do to make my project run again ?

via Chebli Mohamed