One of the more fascinating facilities provided in PHP 5.4 is a built-in web server.
It runs from the command line on Windows, Mac or Linux. You require to enter to the folder where your application resides then run:
php -S localhost:8080
This command will start a console-based web server. The document root is located in the folder:
PHP 5.4.0 Development Server started at Sat Apr 07 10:36:35 2012
Listening on localhost:8080
Document root is /home/user/phpapp
Press Ctrl-C to quit
Now you can then open http://localhost:8080/ in your browser. The server will return either index.php or index.html in the root folder.
This PHP 5.4 web server is intended for development purposes and I think it will be adopted by text editors and possibly browser plug-ins as an easy way to test PHP code.