$this is defined when calling a static method from within an object

While working on Mail_rfc822:: for PEAR, I came across the following scenario: <?php error_reporting(E_ALL); class StaticClass { function doSomething() { echo $this->data; } } class Instantiated { var $data; function Instantiated($data) { $this->data = $data; StaticClass::doSomething(); } } $ob = new Instantiated('foo'); ?> This results in no errors of any kind and the output 'foo'; I would expect $this to be undefined inside static method calls; instead, it seems to be defined to the $this pointer of the calling object, if you are indeed calling from within an object. Is this just a side effect? I think $this should be undefined inside all static method calls (even if you call a method in the class - you might _want_ static behavior sometimes), but I don't know how feasible that is, and I'm interested what Zeev and co. have to say... -chuck -- Charles Hagenbuch, <chuck@horde.org> "If you can't stand the heat, get out of the chicken!" - Baby Blues