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Bug #49500 call_user_func object parameter is not passed as reference
Submitted: 2009-09-08 15:03 UTC Modified: 2009-09-09 07:40 UTC
From: casper at procurios dot nl Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.3.0 OS: Linux
Private report: No CVE-ID: None
View Developer Edit
 [2009-09-08 15:03 UTC] casper at procurios dot nl 
Description:
------------
When call_user_func is called with an object as it's second parameter, 
it's not passed as reference. Instead the PHP warning 'Parameter 1 to 
myFunction() expected to be a reference, value given' is cast.

myFunction() is not called at all.

This is a major compatibility break from 5.2.

Reproduce code:
---------------
class MyClass {
	var $someVar = 'test';
}

function myFunction(&$Object) {
	echo $Object->someVar . "\n";
}

$Object = new MyClass();
myFunction($Object);
call_user_func('myFunction', $Object);


Expected result:
----------------
test
test

Actual result:
--------------
test
PHP warning Parameter 1 to myFunction() expected to be a reference, 
value given

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 [2009-09-08 15:28 UTC] casper at procurios dot nl 
My workaround code has a similar issue:

function workaroundforbug49500_call_user_func()
{
	$params = func_get_args();
	$func = array_shift($params);
	return call_user_func_array($func, $params);
}

Casts: 'PHP warning Parameter 1 to myFunction() expected to be a 
reference, value given' too. 

func_get_args() seems affected too.
 [2009-09-08 17:33 UTC] jani@php.net 
Please do not submit the same bug more than once. An existing
bug report already describes this very problem. Even if you feel
that your issue is somewhat different, the resolution is likely
to be the same. 

Thank you for your interest in PHP.
 [2009-09-09 07:40 UTC] casper at procurios dot nl 
Jani, could you tell me what bug number this is related to? I have been 
searching for it before I posted this one, searched again now. I found 
duplicate bug #44626 but that one is marked bogus as well.

Two other bugs #43568 & #47402 deal with call_user_func too, but seem 
unrelated.
 [2010-05-08 15:31 UTC] schindler dot andor at pokhalo dot hu 
Still bogus in PHP 5.3.2, and it's platform irrelevant. I tested on
Windows and Mac OS X too.

<?php

error_reporting(E_ALL | E_STRICT);

function foo(&$bar)
{
	echo gettype($bar)."\n";
}

class A {}

$foo = 'foo';
$a = new a();
$b = array();

foo($a);
$foo($a);
call_user_func($a);

foo($b);
$foo($b);
call_user_func($b);


Result (PHP 5.3.0+):
--------------------
object
object

Warning: Parameter 1 to foo() expected to be a reference, value given in
.../proba.php on line 18
array
array

Warning: Parameter 1 to foo() expected to be a reference, value given in
.../proba.php on line 22

Expected result (PHP 5.2.x):
----------------------------
object
object
object
array
array
array
 
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