Does static method in PHP have any difference with non-static method?

Question

class t {
    public function tt()
    {
        echo 1;
    }
}
t::tt();

See?The non-static function can also be called at class level.So what\'s

Answer 1

A main difference that has not been mentioned relates to polymorphic behavior.

Non static methods, when redeclared in a derived class, override the base class method, and allow polymorphic behavior based on the type of the instance they are called on. This is not the case for static methods.

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PHP 5.3 introduced the concept of late static binding which can be used to reference the called class in a context of static inheritance.