Data Structure and Algorithm

I want to take the Data Structure and Algorithm course which is in JavaScript but I am a PHP Backend Developer.

Will it help me with my PHP skills?

It will help you with Data Structures, Algorithms and JS skills. I’m really doubt it will sharpen your PHP skills.

What I’m actually asking is if I could implement the Data Structure and Algorithm knowledge learnt in JS while programming in PHP.

You would be learning how to approach common problems programmatically, which isn’t tied to any particular language. The freeCodeCamp tests will only work on JavaScript code though.