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

The Static Keyword

Because static methods are callable without an instance of the object created, the pseudo-variable $this is not available inside the method declared as static.

Static properties cannot be accessed through the object using the arrow operator ->.

Calling non-static methods statically generates an E_STRICT level warning.

Just because you can call non-static methods statically doesn't mean you should. It's bad form.