Troubleshoot and resolve Legacy Smarty Tags errors.
To promote better security, we plan to move to Smarty 4, which is not compatible with SmartyBC, in the near future. If you use certain Smarty tags, you must remove them now.
You can adjust the login session length for admins and users.
Troubleshoot and resolve warnings about the OPcache PHP extension.
WHMCS may return PHP errors and exceptions if errors occur.
You can view information about your PHP configuration from within the Admin Area.
To meet WHMCS's PHP version requirements, you may need to periodically update PHP to a new supported version.