what is the code for this php prog?

[Apurva Surve]

Define an interface which has methods area(),volume() . Define constant PI. Create a class cylinder which implements this interface and calculate area and volume.(Hint: Use Define)

[MrMancunian]

We're really not going to do your homework. Please read our Guidelines on posting Homework questions.

Steven

[Dormilich]

Define constant PI.

just to impress your teacher: why re-inventing the wheel? nearly every programming language has an implementation of π.