static methods in php

Static methods can be accessed by self keyword within the class and we can't use this keyword. Let's see the mock zend certification test question.

Question: What is the primary difference between a method declared as static and a normal method?

Answer:

1.Static methods can only be called using the :: syntax and never from an instance
2.Static methods do not provide a reference to $this
3.Static methods cannot be called from within class instances
4.Static methods don't have access to the self keyword
5.There is no functional difference between a static and non-static method
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