（PHP）从类代码中取消设置对象

Question

Is it possible to unset (clean or un-instantiate) an object of a class by executing code of that particular class?

My scenario is one that, for some reason, I reach a point that the object has no meaning to exist anymore, so I want to make sure that is will not be used again by killing its reference in memory.

Here is a snippet example:

class Foo {
    public $bar = "doh!";
    function destroy() {
        // ???    
    }
}
$o = new Foo();
echo $o->bar . '
';
$o->destroy();
echo $o->bar . '
'; // I expect an error here...

If I do a "unset" command outside the class code, it works, obviously:

$o = new Foo();
unset($o);
echo $o->bar . '
'; // PHP Notice:  Undefined property: Foo::$bar in ...

But I tried to do it inside the "destroy" method, by calling "unset", or creating a custom "__destruct", but none worked.

Any ideas are very welcome.

Cheers,

Answer 1

Yeah, it seems impossible to achieve... another dirty way could be:

class Foo {
    public $bar = "doh!";
    function destroy() {
        unset($this->bar); // and do this for EVERY property of this class
    }
}
$o = new Foo();
echo $o->bar . '
';
$o->destroy();
echo $o->bar . '
'; // PHP Notice:  Undefined property: Foo::$bar in...

However, the object would still exists, and methods would still be accessible.