System Requirements

From WHMCS Documentation

WHMCS requires the following in order to run:

• PHP Version 4.2.x or later
• MySQL Version 4.1.x or later
• Curl Support (with SSL support)
• GD Image Library
• Ioncube Loaders Support

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.