Description:
------------
You have two classes (Class1 and Class2). Class1 calls a non static Class2 function with a Class2 variable assignment, but without a return value. The value set in Class2 is somehow assigned to Class1. If the function was set to static or the class is instantiated the problem does not occur. See code example below for better explanation...

Reproduce code:
---------------
// UNEXPECTED RESULTS
class Class1 {
	public function __construct() {
		Class2::dosomething();
	}
}

class Class2 {
	
	private $somevar;
	public  function dosomething() {
		$this->somevar = 'test';
	}
	
	
}

$x = new Class1();
print_r($x);


/*
// WORKS CORRECTLY
class Class1 {
	public function __construct() {
		$x = new Class2();
		$x->dosomething();
	}
}

class Class2 {

	private $somevar;
	public  function dosomething() {
		$this->somevar = 'test';
	}
	
	
}

$x = new Class1();
print_r($x);
*/

Expected result:
----------------
Class1 Object ( )

Actual result:
--------------
Class1 Object
(
    [somevar] => test
)