Why command "php artisan serve" not working
try
php -S localhost:8000 -t public/
source : http://allbitsnbytes.com/posts/php-artisan-serve-not-working/
Try this also
php -S 127.0.0.1:8000 -t public/
https://www.tutsmake.com/laravel-command-php-artisan-serve-not-working-properly/