How to Use PHP 5
Our web servers are configured to use PHP 4 by default, but PHP 5 is available. To use PHP 5 on your web site, you need to create or edit a file called .htaccess (note the period at the beginning of the file name) in your public_html directory (or whatever subdirectory needs to use PHP 5). The .htaccess file should contain the following line:
AddType application/x-httpd-php5 .php5 .php
Please be aware that some older PHP applications may not work with PHP 5. For more information, see the section of the PHP manual about migrating from PHP 4 to PHP 5.