Challenge 1 / 2

We're building a new class of planets that always have the same radius. We're in a heated (geeky) debate over whether or not to make a method static. Here are the two options:

// OPTION 1
class StaticallySizedPlanet
{
    public function getRadius()
    {
        return 250;
    }
}

// OPTION 2
class StaticallySizedPlanet
{
    public static function getRadius()
    {
        return 250;
    }
}

Which would you recommend?

OPTION 1 (non-static): The "radius" of a planet is a property that should really belong to each, individual planet.

OPTION 1 (non-static): "getter" functions like this (e.g. getRadius(), getName(), etc) should always be non-static.

OPTION 2 (static): The method does not rely on the $this variable, so we should make it static.

OPTION 2 (static): The method always returns a static, or constant value. This is precisely when you should use a static method.

Rewatch the video