If you require a different version of PHP than which we run by default you can select which version of PHP your account uses from inside of your cPanel under the "Software/Services" section at the icon "Select PHP version".
By default the "Current PHP version" will be set to "native", this is the version of PHP which we compile on our servers and not a pre-compiled version (like the alternative versions). Currently our native version is running PHP 5.4
You will select the version which you want to use from the drop down and press "Set as current" to set that version as the Current PHP version.
Please be aware if you have any custom php.ini files in your hosting account you will need to rename or remove these as this could break these alternative versions of PHP. Any custom settings you wish to make to these alternative versions will need to be made by pressing the "Show PHP Settings" button once you have set the version you wish to use as the current version!!
If you have any questions please feel free to open a support ticket with our support department and they should be able to assist you in this matter.