Most current web servers with PHP & MySQL installed will be capable of running WHMCS. The minimum requirements are:
- Linux or Windows OS
- PHP Version 5.2.x - 5.4.x (with JSON)
- MySQL Version 4.1.x and above (Strict Mode Disabled)
- Curl Support (with SSL)
- GD2 Image Library
- Ioncube Loaders V4.0 or later
PHP 5.5 Compatibility
PHP Version 5.5 is not supported at the current time due to Ioncube encoding restrictions.