Bug #52157 [NEW]: Unwanted call of the magic __call method

From: Date: Wed, 23 Jun 2010 10:43:55 +0000
Subject: Bug #52157 [NEW]: Unwanted call of the magic __call method
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-151800@lists.php.net to get a copy of this message
From:             
Operating system: Debian
PHP version:      5.2.14RC1
Package:          *General Issues
Bug Type:         Bug
Bug description:Unwanted call of the magic __call method

Description:
------------
hello everyone ;

In the documentation, it's said that the magic __call method is called when
an inaccessible member is read. But I've small issue in my current class
with a setter method. When I try to set an Alias on an inexistent member,
the magic __call method is also called.

To solve the problem, I uses a workaround like this in the setter method:

public static function &setAlias($index, &$value) {

	$instance = self::getInstance();
	// Small workaround to avoid call of magic __get().
	$instance->$index = '';

	return $instance->$index = &$value;
}

Strange behavior, no ? It's bug or not, if not, can you explain to me the
reason of this statement ? I uses php 5.2.6.

Sorry, for my poor english, I'm french.

Test script:
---------------
class Registry {

	protected static $_instance = null;

	public static function getInstance() {

		if(self::$_instance == null) {
			self::$_instance = new self;
		}

		return self::$_instance;
	}

	public function __get($index) {

		print 'Oh my god...';
	}

	public static function &setAlias($index, &$value) {

		$instance = self::getInstance();
		return $instance->$index = &$value;
	}
}

class myObject {

	protected static $_instance = null;

	public static function &getInstance() {

		if(self::$_instance == null) {
			self::$_instance = new self();
		}

		return  self::$_instance;
	}

}

// Here, I want register a myObject instance by reference (not by object
identifier)
Registry::setAlias('MyData', myObject::getInstance());

echo '<pre>';
	var_dump(Registry::getInstance());
echo '</pre>';


Expected result:
----------------
object(Registry)#2 (1) {
  ["MyData"]=>
  &object(myObject)#1 (0) {
  }
}


Actual result:
--------------
Oh my god... Notice: Indirect modification of overloaded property
Registry::$MyData has no effect in /var/www/test.php on line 67 Fatal
error: Cannot assign by reference to overloaded object in /var/www/test.php
on line 67 

-- 
Edit bug report at http://bugs.php.net/bug.php?id=52157&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=52157&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=52157&r=trysnapshot53
Try a snapshot (trunk):              http://bugs.php.net/fix.php?id=52157&r=trysnapshottrunk
Fixed in SVN:                        http://bugs.php.net/fix.php?id=52157&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=52157&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=52157&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=52157&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=52157&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=52157&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=52157&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=52157&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=52157&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=52157&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=52157&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=52157&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=52157&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=52157&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=52157&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=52157&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=52157&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=52157&r=mysqlcfg



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