Most current web servers* with PHP & MySQL installed will be capable of running WHMCS.
The following table shows the minimum and recommended system requirements for running WHMCS 7.5 and later.
Requirement | Minimum | Recommended |
---|---|---|
PHP Version | 5.6.0 | Latest 7.1 or 7.2 Release |
PHP Memory Limit | 64MB | 128MB** |
PHP Database Extension | PDO | PDO |
PHP Extensions | Curl with SSL GD2 Image Library JSON Support XML |
Curl with SSL GD2 Image Library JSON Support IMAP MBString Iconv |
MySQL Version | 5.2.0 | 5.5.x |
Ioncube Loaders | 10.1.0 or later | The latest 10.1.x version |
WHMCS 7.0-7.4 supports PHP 5.6 and 7.0
WHMCS 7.5 and later supports PHP 5.6, 7.0, 7.1, and 7.2
WHMCS 7.6 and above currently supports PHP 5.6, 7.0, 7.1, 7.2 and 7.3
For full details please visit WHMCS official documentation at https://docs.whmcs.com/Version_7.8.0_Release_Notes