You already know how to start and finish a PHP file using regular methods. The code below shows the common way of creating a PHP file:

<?phpecho "Hello About.com!"; ?> What you might not know is that you can run this same bit of code using the script tag:
<script language = "php">echo "Hello About.com!"; </script> The script tags can identify a language (PHP or otherwise) who's code you will be running in a section.

This is useful in a file that allows for mixed scripting languages. While it is not a common setup, it is sometimes used. By using the script tags, you can easily identify what language is where, and when it switches.