Description:
------------
I can call a public function like a static function from another class. The variable "$this" refers to the caller.

Reproduce code:
---------------
<?php

class testA{
        private $var;

        public function __construct(){
                $this->var = 'Hello';
        }

        public function getVar(){
                return $this->var;
        }

        public function test(){
                return $this->getVar();
        }
}

class testB{

        public function test(){
        // Should not work!
                echo testA::test();
        }
}

$myTestB = new testB();
$myTestB->test();
?>


Expected result:
----------------
Error because class testB called a static function that does not exists.

Actual result:
--------------
Call the static method "getVar()" in class testB. $this refers to testB.

PHP Fatal error:  Call to undefined method testB::getVar() in /var/www/svnhome/kronos/kronoscrm/test.php on line 15

Fatal error: Call to undefined method testB::getVar() in /var/www/svnhome/kronos/kronoscrm/test.php on line 15