Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:16354
Return-Path: <linux@step.polymtl.ca>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 50546 invoked by uid 1010); 2 Jun 2005 13:30:42 -0000
Delivered-To: ezmlm-scan-internals@lists.php.net
Delivered-To: ezmlm-internals@lists.php.net
Received: (qmail 35467 invoked from network); 2 Jun 2005 13:15:30 -0000
Received: from unknown (HELO step.polymtl.ca) (127.0.0.1)
  by localhost with SMTP; 2 Jun 2005 13:15:30 -0000
Received: from ([127.0.0.1:29124])
	by pb1.pair.com (ecelerity 1.2 r(5656M)) with ECSTREAM
	id AC/82-16559-2760F924 for <internals@lists.php.net>; Thu, 02 Jun 2005 09:15:30 -0400
X-Host-Fingerprint: 132.207.230.198 clnt01-230-198.vpn.polymtl.ca  
Received: from ([132.207.230.198:23743] helo=localhost.localdomain)
	by pb1.pair.com (ecelerity 1.2 r(5656M)) with SMTP
	id 38/C1-16559-3240F924 for <internals@lists.php.net>; Thu, 02 Jun 2005 09:05:39 -0400
Message-ID: <38.C1.16559.3240F924@pb1.pair.com>
To: internals@lists.php.net
Date: Thu, 02 Jun 2005 09:05:24 -0400
User-Agent: Mozilla Thunderbird 1.0.2-1.3.3 (X11/20050513)
X-Accept-Language: en-us, en
MIME-Version: 1.0
X-Enigmail-Version: 0.90.0.0
X-Enigmail-Supports: pgp-inline, pgp-mime
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Posted-By: 132.207.230.198
Subject: PHP5, objects not passed by reference?!?
From: linux@step.polymtl.ca (Jean-Francois Levesque)

Hi!

In PHP5, the objects are supposed to be passed by reference, right?  I 
try to use a singleton pattern but it's not working.  I just compile the 
lastest php version (5.0.4) and I still have the problem.

My code :

<?php
class Example
{
    // Hold an instance of the class
    private static $instance;
    public $testvar = 'init';

    // The singleton method
    public static function singleton()
    {
        if (!isset(self::$instance)) {
            $c = __CLASS__;
            self::$instance = new $c;
        }

        return self::$instance;
    }
    // Prevent users to clone the instance
    public function __clone()
    {
        trigger_error('Clone is not allowed.', E_USER_ERROR);
    }
}

$test = Example::singleton();
$test2 = Example::singleton();

$test->testvar = 1;
$test2->testvar = 2;

echo $test->testvar." ; ".$test2->testvar;

?>


Output :

Fatal error: Clone is not allowed. in 
/usr/home/usagers/linux/step_html/stationnement/test.php on line 21


Phpinfo : http://step.polymtl.ca/~linux/stationnement/phpinfo.php

Should I set something in the php.ini?  What can I do?

Thanks for your help!

Jean-Francois