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Bug #43480 current,next,prev with objects
Submitted: 2007-12-02 22:20 UTC Modified: 2007-12-05 15:45 UTC
From: nicholsr@php.net Assigned:
Status: Not a bug Package: Arrays related
PHP Version: 5.3CVS-2007-12-02 (snap) OS: all
Private report: No CVE-ID: None
View Developer Edit
 [2007-12-02 22:20 UTC] nicholsr@php.net 
Description:
------------
The array functions current, next,prev and possibly others no longer work on objects on php5.3.

The expected result below was obtained on php 5.2.

I noticed that at least one of the testcases were changed in order to avoid calling out this change in behaviour so i wondered if it was deliberate. 

Specifically, ext/standard/tests/array/009.phpt in PHP 5.2 will check for object behaviour but this was removed in 5.3. 

Reproduce code:
---------------
<?php

class myclass {

public $prop1="prop1";
public $prop2="prop2";

};

$obj=new myclass();

var_dump (current($obj));
next ($obj);
var_dump (current($obj));
?>

Expected result:
----------------
string(5) "prop1"
string(5) "prop2"

Actual result:
--------------
Warning: current() expects parameter 1 to be array, object given in 1.php on line 12
NULL

Warning: next() expects parameter 1 to be array, object given in 1.php on line 13

Warning: current() expects parameter 1 to be array, object given in 1.php on line 14
NULL

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 [2007-12-02 22:22 UTC] johannes@php.net 
Jani, I'd say it's related to your zend_parse_parameters MFH'ing.
 [2007-12-02 22:24 UTC] tony2001@php.net 
The change makes sense to me.
Using array funcs with objects is quite useless feature that should be dropped IMO.
 [2007-12-02 22:48 UTC] derick@php.net 
I don't see why we should unnecessarily break BC for this though..
 [2007-12-02 22:50 UTC] nicholsr@php.net 
I do not have an opinion on whether this behaviour should be dropped. I just noticed that the behaviour had changed. I asked Johannes if this was a deliberate decision and he advised me to open this bug.  I dont know the source of enough PHP apps to know if this is likely to be a major BC hit moving from PHP 5.2 to 5.3. I dont know how common this idiom is.
 [2007-12-02 22:57 UTC] tony2001@php.net 
The BC break is minimal, if at all.
I've never heard of such usage before.
 [2007-12-03 15:56 UTC] jani@php.net 
This was merely MFH'd. If it's wrong in HEAD, that should be dealt with. I have nothing to do with how this works in HEAD.
 [2007-12-04 05:58 UTC] crrodriguez at suse dot de 
I see nothing wrong with this new behaviuor, the old one looks pretty much broken.
 [2007-12-04 12:34 UTC] jani@php.net 
And neither do I. Sometimes things get fixed with new versions.. ;)
 [2007-12-04 18:41 UTC] stas@php.net 
Similar, if not exactly the same, behavior is documented in the manual:
http://www.php.net/manual/en/language.oop5.iterations.php

and I can see no compelling reason to forbid doing the same with functions. Is there one? I think it's too early to close this one.
 [2007-12-05 15:45 UTC] jani@php.net 
All these functions expect an array as parameter and that is also how it's been documented. It was only a side-effect that it worked for objects. And that document page you refer to (and the iterator there) is for _arrays_ not objects.
 
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