getting an object's variable?

[genericnumber1]

Is there a way to get the variable name of the current instance of an object?
I know it can be done by something like this...

[code=php:0]
<?php
class foo {
    public $instanceVar;

    public function __construct($var){
          $this->instanceVar = $var;
    }
}
$bar = new foo('bar');
echo $bar->instanceVar;
?>
[/code]

but is there some other way? like... a function that can be called inside the object? It's not critical that I know, just something that's made me curious.

[trq]

[quote]but is there some other way?[/quote]

Nope. Why would you need it? It doesn't exist within the class, that is what $this is for.

[genericnumber1]

in case it needed to be passed to a different class perhaps? :X Oh well it's cleaner to pass it by reference outside the class anyways.