#33586 [NEW]: Serialization breaks references

[wmeler at wp dot pl]

From:             wmeler at wp dot pl
Operating system: Any
PHP version:      5.0.4
PHP Bug Type:     Variables related
Bug description:  Serialization breaks references

Description:
------------
After serializing variable with circular reference you get 2 copies of
root variable.
Look at output of reproduce code - var_dump outputs should be the same but
they are not.

for code: 

$c['d2']=&$d;
$d['c2']=&$c;
echo serialize($c);

you get

a:1:{s:2:"d2";a:1:{s:2:"c2";a:1:{s:2:"d2";R:2;}}}

I think that it should be something like

a:1:{s:2:"d2";a:1:{s:2:"c2";R:1;}}


Reproduce code:
---------------
<?
$c['d2']=&$d;
$d['c2']=&$c;
$x=unserialize(serialize($c));
$x['x']='x';
$c['x']='x';
var_dump($c);
var_dump($x);


Expected result:
----------------
array(2) {
  ["d2"]=>
  &array(1) {
    ["c2"]=>
    &array(2) {
      ["d2"]=>
      &array(1) {
        ["c2"]=>
        &array(2) {
          ["d2"]=>
          *RECURSION*
          ["x"]=>
          string(1) "x"
        }
      }
      ["x"]=>
      string(1) "x"
    }
  }
  ["x"]=>
  string(1) "x"
}
array(2) {
  ["d2"]=>
  &array(1) {
    ["c2"]=>
    &array(2) {
      ["d2"]=>
      &array(1) {
        ["c2"]=>
        &array(2) {
          ["d2"]=>
          *RECURSION*
          ["x"]=>
          string(1) "x"
        }
      }
      ["x"]=>
      string(1) "x"
    }
  }
  ["x"]=>
  string(1) "x"
}


Actual result:
--------------
array(2) {
  ["d2"]=>
  &array(1) {
    ["c2"]=>
    &array(2) {
      ["d2"]=>
      &array(1) {
        ["c2"]=>
        &array(2) {
          ["d2"]=>
          *RECURSION*
          ["x"]=>
          string(1) "x"
        }
      }
      ["x"]=>
      string(1) "x"
    }
  }
  ["x"]=>
  string(1) "x"
}
array(2) {
  ["d2"]=>
  &array(1) {
    ["c2"]=>
    array(1) {
      ["d2"]=>
      &array(1) {
        ["c2"]=>
        array(1) {
          ["d2"]=>
          *RECURSION*
        }
      }
    }
  }
  ["x"]=>
  string(1) "x"
}


-- 
Edit bug report at http://bugs.php.net/?id=33586&edit=1
-- 
Try a CVS snapshot (php4):   http://bugs.php.net/fix.php?id=33586&r=trysnapshot4
Try a CVS snapshot (php5.0): 
http://bugs.php.net/fix.php?id=33586&r=trysnapshot50
Try a CVS snapshot (php5.1): 
http://bugs.php.net/fix.php?id=33586&r=trysnapshot51
Fixed in CVS:                http://bugs.php.net/fix.php?id=33586&r=fixedcvs
Fixed in release:            http://bugs.php.net/fix.php?id=33586&r=alreadyfixed
Need backtrace:              http://bugs.php.net/fix.php?id=33586&r=needtrace
Need Reproduce Script:       http://bugs.php.net/fix.php?id=33586&r=needscript
Try newer version:           http://bugs.php.net/fix.php?id=33586&r=oldversion
Not developer issue:         http://bugs.php.net/fix.php?id=33586&r=support
Expected behavior:           http://bugs.php.net/fix.php?id=33586&r=notwrong
Not enough info:             
http://bugs.php.net/fix.php?id=33586&r=notenoughinfo
Submitted twice:             
http://bugs.php.net/fix.php?id=33586&r=submittedtwice
register_globals:            http://bugs.php.net/fix.php?id=33586&r=globals
PHP 3 support discontinued:  http://bugs.php.net/fix.php?id=33586&r=php3
Daylight Savings:            http://bugs.php.net/fix.php?id=33586&r=dst
IIS Stability:               http://bugs.php.net/fix.php?id=33586&r=isapi
Install GNU Sed:             http://bugs.php.net/fix.php?id=33586&r=gnused
Floating point limitations:  http://bugs.php.net/fix.php?id=33586&r=float
No Zend Extensions:          http://bugs.php.net/fix.php?id=33586&r=nozend
MySQL Configuration Error:   http://bugs.php.net/fix.php?id=33586&r=mysqlcfg