Issue on installing WHMCS on server due to IonCube Loaders

If you are having problem on installing the WHMCS on your server having same issue as below;

....install/install.php requires the ionCube PHP Loader 
ioncube_loader_lin_5.4.so to be installed by the website operator. If 
you are the website operator please use the ionCube Loader Wizard to 
assist with installation.

Please follow the below steps;

Installing IonCube Loaders with cPanel & WHM
It can be done one of two ways:

1. Using EasyApache via WHM >> EasyApache, IonCube Loaders can be selected under the Exhaustive Options List prior to compiling.

2. As the user `root` via SSH, you can run the below command to install IonCube Loaders without having to recompile Apache:

/scripts/phpextensionmgr install IonCubeLoader