Version 5.x System Requirements

WHMCS requires the following in order to run:

• PHP Version 4.2.x or later
• MySQL Version 3.2.x or later (Not In Strict Mode)
• Curl Support (with SSL support)
• GD Image Library
• Ioncube Loaders Support
• Open_basedir Disabled (doable in the 'php.ini' - typically located in /etc/php.ini)
• Register Globals Off (doable in the 'php.ini' - typically located in /etc/php.ini)

WHMCS does not need to be tied to a server for automatic account provisioning in order to function. You can use the system as a standalone billing & support center without any issues.