Re: Overloading Limitation- Can Someone Confirm?

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Chris wrote:
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?

I think its a misunderstanding on the one side and a limitation on the other,
you can't use overloading directly on items of an overloaded array e.g:

	echo $tc->arr['a']

this is triggers a call to __get() with the $key parameter set to something like
(I'm guessing) "arr['a']" ... what $key is set to it surely wont be a key in the
array testClass->vars (do some test otherwise to see eactly what $key
contains if you do "echo $tc->arr['c']" maybe it contains something useful after all)

try this:

<?php

$tc = new testClass();

$tc->a = 'A';
$tc->b = 'B';

if (isset($tc->b)) {
	unset($tc->b);
}

var_dump($tc);


Chris
chris@xxxxxxxxxxxxxxxxx


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