Edit report at https://bugs.php.net/bug.php?id=62171&edit=1
ID: 62171
Comment by: marc-bennewitz at arcor dot de
Reported by: ray dot burgemeestre at gmail dot com
Summary: "Nesting level too deep - recursive dependency?" in
case of ===
Status: Open
Type: Bug
Package: *Programming Data Structures
Operating System: linux
PHP Version: 5.4.3
Block user comment: N
Private report: N
New Comment:
I have the same issue in a logger method stringify all values into a readable
format (Zend\Log\Formatter\Base::normalize) which ever fail if the value
contains a self referencing entry. It's simply not possible to check this case
so in will result in an infinite loop or we get the fatal here described.
AND on logging using the error handler there is a $context argument containing
such a self reference :(
Previous Comments:
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[2012-06-03 21:40:25] ray dot burgemeestre at gmail dot com
Didn't see your reply, that sounds good Felipe.., will check it out tomorrow..
thanks.
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[2012-06-03 21:36:33] ray dot burgemeestre at gmail dot com
@carloschilazo of course removing the & fixes the error. You realize this is a
bugreport right?
My point is that I think the === operator should still return true or false. In
this case true as $a and $a[0] are the same object.
My testcase was a little ambiguous, shiranai7's version is better: $a =
array(); $a[0] = &$a;.
------------------------------------------------------------------------
[2012-06-03 21:31:12] fel...@php.net
I've committed a change that will return immediately true the comparison
between same array. So, at least your '$a = array(&$a); $a === $a;' will works.
------------------------------------------------------------------------
[2012-06-03 20:54:27] carloschilazo at gmail dot com
I think the problem is your test script:
<?php
$a = array(&$a); <<<<<<< HERE
$a === $a;
?>
you are passing the value of $a by reference, and to invoke the value then it
calls itself.
remove the & and it works
------------------------------------------------------------------------
[2012-05-28 15:56:06] shiranai7 at hotmail dot com
I can confirm this on Windows. I also tried more cases:
For arrays: $a = array(); $a[0] = &$a;
For objects: $a = new stdClass; $a->b = &$a;
Results for comparisons of $a, $b
Type PHP Operator Result
---------------------------------------------
arrays 4.4.5 == fatal
arrays 4.4.5 === fatal
objects 4.4.5 == fatal
objects 4.4.5 === fatal
arrays 5.2.6 == fatal
arrays 5.2.6 === fatal
objects 5.2.6 == true
objects 5.2.6 === true
arrays 5.3.5 == fatal
arrays 5.3.5 === fatal
objects 5.3.5 == true
objects 5.3.5 === true
arrays 5.4.3 == fatal
arrays 5.4.3 === fatal
objects 5.4.3 == true
objects 5.4.3 === true
So this was fixed (either intentionally or along with general changes to object
handling) in PHP 5 for objects but not for arrays.
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