Description:
------------
If you overwrite __set in a child class, the parent implementation is called first 
and than triggers the child version.

I found another bug, which says that you should implement the __set method in the 
parent class, but it in this case both methods are called.

A similar bug is reported in #44807, but it's only about the recursion prevention.

Test script:
---------------
<?php
	class Foo {
		function __set($key, $value) {
			$this->{$key} = $value . ' (Foo)';
		}
	}
	
	class Bar extends Foo {
		function __set($key, $value) {
			$this->{$key} = $value . ' (Bar)';
		}
		
		function set() {
			parent::__set('foobar', 'Test');
		}
	}
	
	$bar = new Bar();
	$bar->set();
	echo $bar->foobar;
?>

Expected result:
----------------
Test (Foo)

Actual result:
--------------
Test (Foo) (Bar)