The difference between “public” and “public static”?

Question

What does static mean?

I know public means that it can be accessed from outside the class, and private only from inside the class…

Answer 1

From http://php.net/manual/en/language.oop5.static.php

Declaring class properties or methods as static makes them accessible without needing an instantiation of the class. A property declared as static can not be accessed with an instantiated class object (though a static method can).