Ascending Logic Peaks with the Resolution Operator In PHP, the scope resolution operator, or the double colon ::, allows you to access constants, static properties and methods, and overridden properties and methods. We’ve created a couple of constants in our previous articles, but we’ve never actually accessed them. Method Overriding If you’re accessing, for example, a constant outside of the class, you would append the double colon operator to the instantiated object, or even the class name. If you’re accessing the constant or overridden property or method inside of the class, you would use either self, parent, or the static keyword. We’ll cover self and parent in this article;