Exploit code execution without known PHP functions

I don’t if this is the best place to post this one.

Anyways, I was taking an attempt to a known certification, and I had to exploit a web app which had a known code execution vulnerability, BUT, all PHP functions that I knew were blacklisted. This is a list that was similar to the one that was blacklisted in this server:


So essentially my question is if there is ANY way to have code execution, WITHOUT using any of the above functions.

i would go with eval()