Description:
------------
I am using PHP5 RC2 (couldn't yet select it - have downloaded it a few minutes ago ...) on Windows XP Professional with Apache2.0.49. 
This bug is similar to #20089 but I'm complaining more about the instanceof issue. The true fix is of course fixing #20089 first. Saying "This is not a bug" is not a good thing with the goal of better object orientation for PHP5 ...

When calling an instance function ("->" needed) as a class function ("::") this should either be an error or instanceof for the given class should fail - it looks like 
a) instanceof returns "" instead of FALSE/0 when 
this is not the correct instance
b) when calling an instance function of another class in a static way this should be an error 

Reproduce code:
---------------
<?php
class Foo
{
  function __construct  () { echo 'Generating a Foo object <br />'; }    
  function getInstance  () { return new Foo();	                    }	    
  function operation    () { echo "Foo operation this is a ".get_Class($this)."<br>";
                             echo "This is a Foo: ".$this instanceof Foo."<br>"; }	
  function baroperation () { Bar::operation();                      }
}

class Bar 
{
  function __construct  () { echo 'Generating a Bar object <br />'; }    
  function getInstance  () { return new Bar();	                    }	    
  function operation    () { echo "Bar operation this is a ".get_Class($this)."<br>";
                             echo "This is a Bar: ".$this instanceof Bar."<br>"; }	
  function fooOperation () { Foo::operation();                      }
}
$foo = Foo::getInstance();
$bar = Bar::getInstance();
$foo->operation();
$bar->operation();
$foo->baroperation();
$bar->foooperation();
Foo::operation();
Bar::operation();
?> 

Expected result:
----------------
Generating a Foo object
Generating a Bar object
Foo operation this is a Foo
This is a Foo: 1
Bar operation this is a Bar
This is a Bar: 1
error Bar operation but this is a Foo
This is a Bar: 0 
error Foo operation but this is a Bar
This is a Foo: 0
Foo operation this is a nil
This is a Foo: 0
Bar operation this is a nil
This is a Bar: 0


Actual result:
--------------
Generating a Foo object
Generating a Bar object
Foo operation this is a Foo
This is a Foo: 1
Bar operation this is a Bar
This is a Bar: 1
Bar operation this is a Foo
This is a Bar: 
Foo operation this is a Bar
This is a Foo:
Foo operation this is a
This is a Foo:
Bar operation this is a
This is a Bar: