Having problem with PHP .. please read the description

Question

I am beginner in PHP and I have to do a question which is "Program to take inputs of 5 students records related to 5 subjects marks and calculate percentage and grade etc. It will be great if someone helps me

Answer 1

https://code.sololearn.com/wlGiKXUn1jht/?ref=app

See in this program I just simply do input marks and simply do calculation, what I actually need to do is to input 5 students records of 5 subjects using arrays . I can't understand how I do whole work with array in php