It is meant to be used with PHP’s internal web server which was introduced in PHP 5.4.
According to the PHP manual:
This web server is designed for developmental purposes only, and
should not be used in production.
I can’t emphasize this enough.
If you would like to use it with the Laravel server.php file you can head to your cli and start the server with the following command (from the root of your Laravel directory):
php -S localhost:8000 server.php
You should then be able to head to localhost:8000 in your web browser and begin using your Laravel application.
Alternatively as Anand Capur mentioned you can launch the server with:
php artisan serve
Ultimately this just runs the aforementioned php -S command for you.
You can optionally specify the host and port by doing something like:
php artisan serve --port=8080 --host=local.dev
As with all artisan commands you can find out this information and additional information by doing:
php artisan serve --help