We are running PHP 5 on all of our servers.
The version of PHP that is default depends on your hosting type and when you purchased your hosting plan. See the chart below for a breakdown of versions and availability.
Note: If you would like to use a specific version of PHP, please see our articles on Turning on PHP 5.3 and PHP 5.4 for details.
We can also install PHP 5.4 on VPS and Dedicated Servers.
Secondary installs of PHP (both 5.3 and 5.4) are free. By "secondary install," we mean any installation of PHP that is outside what is managed via a control panel.
it is recommended that you prepare your scripts to be compatible with PHP 5.3 or PHP 5.4 for future compatibility.