PHP 7.2 & 7.3
Ioncube Loaders v 10.x
GD Library Enabled
WHMCS 7.7.x supports 2.0.4, 2.0.5
WHMCS 7.8.x, 7.9.x & 7.10 supports 2.0.5, 3.0.0
While these are the minimum requirements, we
strongly recommend using the latest available, stable releases of all software and extensions.