#49821 [Fbk->Opn]: unserialize of references

From: Date: Mon, 12 Oct 2009 11:46:33 +0000
Subject: #49821 [Fbk->Opn]: unserialize of references
References: 1  Groups: php.bugs 
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 ID:               49821
 User updated by:  liz2k dot b8 at gmail dot com
 Reported By:      liz2k dot b8 at gmail dot com
-Status:           Feedback
+Status:           Open
 Bug Type:         *Programming Data Structures
 Operating System: linux
 PHP Version:      5.2.11
 New Comment:

I said about references in unserialize object - R and r.

If last reference of serialized object is R - then all references of
unserialized object will R. (linked by pointer (c++))

If last reference of serialized object is r - then all references of
unserialized object will r. (just refer to one object $a)


Previous Comments:
------------------------------------------------------------------------

[2009-10-12 11:21:28] sjoerd@php.net

I don't understand your answer. Please explain, preferably with a code
example, how the behavior you described causes a problem.

------------------------------------------------------------------------

[2009-10-12 07:01:18] liz2k dot b8 at gmail dot com

no - you can try serialize(&unserialize(serialize($a))).

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[2009-10-11 09:33:52] Sjoerd@php.net

Thank you for your bug report.

Is there a problem with this other than that the serialization string
is different? Do objects $a and $b have different behavior?

------------------------------------------------------------------------

[2009-10-09 14:05:22] liz2k dot b8 at gmail dot com

And one more wrong work Example:

	$a = new stdClass;
	$a->v2 = &$a;
	$a->v1 = $a;
	
	echo serialize($a)."\n";
	
	$b = &unserialize(serialize($a));
	
	echo serialize($b);

Expected result:
----------------
O:8:"stdClass":2:{s:2:"v2";R:1;s:2:"v1";r:1;}
O:8:"stdClass":2:{s:2:"v2";R:1;s:2:"v1";r:1;}

Actual result:
--------------
O:8:"stdClass":2:{s:2:"v2";R:1;s:2:"v1";r:1;}
O:8:"stdClass":2:{s:2:"v2";r:1;s:2:"v1";r:1;}

------------------------------------------------------------------------

[2009-10-09 13:05:44] liz2k dot b8 at gmail dot com

Description:
------------
function unserialize return wrong result of reference

Reproduce code:
---------------
---
From manual page: function.serialize
---
	$a = new stdClass;
	$a->v1 = $a;
	$a->v2 = &$a;
	
	echo serialize($a)."\n";
	
	$b = &unserialize(serialize($a));
	
	echo serialize($b);


Expected result:
----------------
O:8:"stdClass":2:{s:2:"v1";r:1;s:2:"v2";R:1;}
O:8:"stdClass":2:{s:2:"v1";r:1;s:2:"v2";R:1;}

Actual result:
--------------
O:8:"stdClass":2:{s:2:"v1";r:1;s:2:"v2";R:1;}
O:8:"stdClass":2:{s:2:"v1";R:1;s:2:"v2";R:1;}


------------------------------------------------------------------------


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