Start of with PHP, that's what I did too (actually it was php + java, but w/e). C++, php and java share a very similar syntax and once you know how to properly utilise OOP in php you should be ready to storm your way through c++. And PHP is in a certain way easier than C++, but if you're dedicated you could just start directly with C++ (but you will need some time to get used to it). Think of PHP has a test run