From: phplists at stanvassilev dot com
Operating system: Any
PHP version: 5.4.5
Package: Scripting Engine problem
Bug Type: Bug
Bug description:Incorrect serialization with circular references
Description:
------------
The documentation says references and circular references should serialize
properly. I've found that serialize would first copy the referenced
variable,
before detecting the reference.
This not only doubles the serialized output, but produced incorrect copy
when
unserialized.
Test script:
---------------
$original = array('hello');
$original[] = & $original;
echo serialize($original);
// Output (notice the duplication):
// "a:2:{i:0;s:5:"hello";i:1;a:2:{i:0;s:5:"hello";i:1;R:3;}}"
$duplicate = unserialize(serialize($x));
// Now I modify both the original and the duplicate in an identical way.
// But I get different results, because the duplicate points to a copy of
// itself, instead of pointing to itself.
$original[0] = 'world';
$duplicate[0] = 'world';
var_dump($original);
// Produces (notice it says "world" both times, i.e. it points to itself):
// array(2) { [0]=> string(5) "world" [1]=> &array(2) { [0]=> string(5)
"world" [1]=> *RECURSION* } }
var_dump($duplicate);
// Produces (notice the second time it says "hello" i.e. it's a copy):
// array(2) { [0]=> string(5) "world" [1]=> &array(2) { [0]=> string(5)
"hello" [1]=> *RECURSION* } }
Expected result:
----------------
There should be NO copies of "hello" left:
array(2) { [0]=> string(5) "world" [1]=> &array(2) { [0]=> string(5)
"world" [1]=>
*RECURSION* } }
There should be NO duplication in the serialized output:
"a:2:{i:0;s:5:"hello";i:1;???;}" (Fill-in the "???" appropriately :) )
Actual result:
--------------
A copy of "hello" is left:
array(2) { [0]=> string(5) "world" [1]=> &array(2) { [0]=> string(5)
"hello" [1]=>
*RECURSION* } }
There is duplication in the serialized output:
"a:2:{i:0;s:5:"hello";i:1;a:2:{i:0;s:5:"hello";i:1;R:3;}}"
--
Edit bug report at https://bugs.php.net/bug.php?id=62634&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=62634&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=62634&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=62634&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=62634&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=62634&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=62634&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=62634&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=62634&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=62634&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=62634&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=62634&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=62634&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=62634&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=62634&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=62634&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=62634&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=62634&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=62634&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=62634&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=62634&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=62634&r=mysqlcfg
