native events in PHP

I've been looking at events in PHP, at present, in PEAR, there are lots of different methods to add callbacks, to packages, for various purposes. It seriously lacks cohesion, and would be nice to sort out at the language level. Having seen C#, while not perfect, it is an interesting model. There's a very short note on C#, and an idea for a PHP syntax. http://www.akbkhome.com/wiki.php/DBDO/signals.html It suggests: class xxxx {

     // event registers a method, that hooks into the generic event handler.
     public event $onDebug = array();

         function somemethod() {

       // add a handler to an event..
   // this is the natrual syntax for this, but does open the door to someone wiping the stack!
       $this->onDebug[] = array($this,'mycallback');

// initiate the signals. (function name matches the var!) $this->onDebug($x,$y);

    }
    // a handler..
    function mycallback($x,$y) {

echo "debug hander got $x , $y\n";

    }

} Anyone care to comment on a) the feasibility b) the "should it be implemented" question. c) the "any better ideas" question... Regards Alan