How to Upgrade PHP for WHMCS Using cPanel MultiPHP
In order to comply with each version's requirements, you must sometimes upgrade the PHP version on your WHMCS installation's server.
If you use cPanel and EasyApache 4 to host your WHMCS installation, you can use MultiPHP Manager and MultiPHP INI Editor to change your PHP version.
For more information, see Update PHP with cPanel PHP on our new documentation site.