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Subject: serialize bug with array that references to itself?
From: fmmarzoa@gmx.net ("Francisco M. Marzoa Alonso")

Try this code:

<pre>
<?php

$Arr = array();
$Arr['self'] = &$Arr;
var_dump ( $Arr );

$serdata = serialize ($Arr);
$Arr2 = unserialize ( $serdata );
echo "\n\n";
var_dump ( $Arr2 );

?>
</pre>

The second array is expected to be exactly as $Arr, but it doesn't. This 
is the output for that code:

array(1) {
  ["self"]=>
  array(1) {
    ["self"]=>
    *RECURSION*
  }
}

array(1) {
  ["self"]=>
  array(1) {
    ["self"]=>
    NULL
  }
}

As you can see the second array has a NULL value where the first one had 
a recursive reference.

Can this be considered as a bug of PHP serialization system?