Fixing Error: Failed to listen on localhost:8000
(reason: Address already in use)
List processes with php in it
ps -ef | grep php
Example output
501 **9347** 393 0 1:29PM ttys000 0:00.21 php artisan serve
501 9351 **9347** 0 1:29PM ttys000 0:02.01 /usr/local/php5-5.6.14-20151002-085853/bin/php -S localhost:8000 .../laravel/server.php
501 9781 393 0 1:56PM ttys000 0:00.00 grep php
Then kill the process
kill -9 9347