I learn/code with C# BUT I'm forced to study OOP PHP in classroom! Will that impact Negatively about my career as a C# developer?

[Rob Lucci]

Hello, I would like to ask you a question that has been in my head for a while, and I can not find an answer, i learn/code with c# but i'm forced to study oop php in classroom! will that impact negatively about my career as a c# developer? Please help me as soon as possible.