If most people started off with other languages first, before learning PHP, we'd have less "what's wrong with my if statement" posts on this forum, that's for sure 🙂 Most of the questions are about basic programming, not PHP-specific.
It looks like most people are taking PHP as their first language. yikes! :-P
C is a great place to learn coding. The more languages you have under your belt before you start learning PHP the better, for sure.