Hello, I've been working as system administrator for 4 years now. I've worked with CPANEL many times, and so I have with ioncube.
I'ld like to have some extra information on the situation, do you wish to use php on a cpanel hosting? If so, there might be cases in which is impossible due to the nature of CPANEL, its making public and sharing hosting, meaning we can not modify the "sytem".
In order to install ioncube, you must modify some settings in php, this is not possible in cpanel, we would need root access.
Overall, I can achieve the job but it would be great if we talked the details over chat.
Have a nice day.