[PHP] Overloading Limitation- Can Someone Confirm?

[Chris]

While playing with an unnamed framework, I think I discovered an  
overloading limitation (PHP 5.1.2). Can someone please confirm this  
limitation?

Example class:
class testClass
{
    public $vars = array();

    public function __get($key)
    {
        return array_key_exists($key, $this->vars) ? $this->vars 
[$key] : null;
    }

    public function __set($key, $value)
    {
        $this->vars[$key] = $value;
    }

    public function __isset($key)
    {
        return array_key_exists($key, $this->vars);
    }

    public function __unset($key)
    {
        unset($this->vars[$key]);
    }
}


Given the above class, the following code will not work:

$tc = new testClass();

$tc->arr = array();

$tc->arr['a'] = 'A';
$tc->arr['b'] = 'B';

if (isset($tc->arr['b'])) {
    unset($tc->arr['b']);
}

//var_dump is only to see results of above
var_dump($tc);

Am I a moron or, in fact, does this not work and is a language  
limitation?

Chris
[EMAIL PROTECTED]

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