Reference to static method in PHP?

Question

In PHP, I am able to use a normal function as a variable without problem, but I haven\'t figured out how to use a static method. Am I just missing the right syntax, or is this

Answer 1

"A member or method declared with static can not be accessed with a variable that is an instance of the object and cannot be re-defined in an extending class"

(http://theserverpages.com/php/manual/en/language.oop5.static.php)