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Date: Wed, 16 Jul 2003 01:27:52 +0200
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Message-ID: <200307160127.52308.msopacua@php.net>
Subject: Re: [PHP-DEV] $this assignment and call_user_func question
From: msopacua@php.net (Melvyn Sopacua)

Hi Marcus,

On Wednesday 16 July 2003 00:11, Marcus B=F6rger wrote:

> Wednesday, July 16, 2003, 12:08:29 AM, you wrote:
>
> GB> Hi,
>
> GB> I've heard rumors that there are plans to take away the ability to
> GB> assign to $this in php 5.  If this is true, I would like to place a
> vote GB> to keep it, as it can be very useful in conjunction with
> GB> __call()/__get()/__set() to implement run-time aggregation seamlessly
>
> Why do you want to trick yourself and the engine? Can't you find a correct
> solution?

I'm not farmiliar with the example Greg is getting at, but the following bi=
t=20
me recently:
class DomFromString extends DomDocument
{
	function DomFromString($string)
	{
		$this =3D domxml_open_mem($string);
	}
=09
	function foo()
	{
		echo('foo');
	}
}

$doc =3D new DomFromString($xml);
$Root =3D $doc->document_element();

var_dump($doc, $Root);
echo($doc->foo()); // call to undefined function

I'm farmiliar with the trick-element of this code and why it won't work, bu=
t=20
the way to do something similar now, is to *not* extend the extension=20
provided class, use a $this->real_instance and provide methods that re-rout=
e=20
the already existing methods to $this->real_instance.

Unless there's something I'm missing, I find the latter solution has a much=
=20
larger trick element and adds a lot of unnecessary typing.

Note that the goal here, is to extend a class of which may not have the sou=
rce=20
(or the time/ability to modify it)  AND override it's constructor or the=20
constructor is provided by a function, rather than 'new' principle.

>  Marcus                            mailto:helly@php.net

=2D-
Melvyn