Do child classes inherit parent constants and if so how do I access them?

class, oop, php

Solution

I think you would need to access it like this:

self::CONSTANT_1;

or alternatively "parent", which will always be the value established in the parent class (i.e., the constant's immutability is maintained):

parent::CONSTANT_1;

In both parent and children classes, you can use:

static::CONSTANT_1;

Interesting

One thing that is interesting to note is that you can actually override the const value in your child class.

class MyParentClass{

    const CONSTANT_1=1;
}

class MyChildClass extends MyParentClass{

    const CONSTANT_1=2;
}

echo MyParentClass::CONSTANT_1; // outputs 1
echo MyChildClass::CONSTANT_1; // outputs 2

Problem

Original source