Answers for "laravel artisan serve works only once"

php artisan serve

The full command works like this:

php artisan serve --host=<host IP address> --port=<port to use>

php artisan serve --host=127.0.0.1 --port=8080

run laravel without php artisan serve

if your laravel application running in server/hosting, 
just change DocumentRoot pointing to /path/to/your-laravel-app/public