Question

Which one of the following is the right way to call a class constant, given that the class is mathFunction?

(a) echo PI;

(b) echo mathFunction->PI;

(c) echo mathFunction::PI;

(d) echo mathFunction=PI;

I got this question during an online exam.

My doubt stems from Basics of Object-Oriented PHP- 1 topic in section Object-Oriented PHP of PHP

Answer 1

Right answer is (c) echo mathFunction::PI;

To elaborate: The Scope Resolution Operator “::” is a token that allows access to static, constant, and overridden properties or methods of a class.