PHP 7.1, 7.2 & 7.3
Ioncube Loaders v 10.x
WHMCS 7.7.1 supports 1.1.0, 1.1.1
WHMCS 7.8.x, 7.9.x & 7.10 supports 1.1.1
While these are the minimum requirements, we
strongly recommend using the latest available, stable releases of all software and extensions.