isset() and empty() silently casts array to object

Bug #50255	isset() and empty() silently casts array to object
Submitted:	2009-11-21 10:08 UTC	Modified:	2009-11-24 21:54 UTC
From:	tyra3l at gmail dot com	Assigned:	felipe (profile)
Status:	Closed	Package:	Scripting Engine problem
PHP Version:	5.*, 6	OS:	*
Private report:	No	CVE-ID:	None

[2009-11-21 10:08 UTC] tyra3l at gmail dot com

Description:
------------
If you try to check the existence of a property on an array, suprisingly you wont get any error or notice, but you will get the results as you were checking with the correct type.

Reproduce code:
---------------
<?php
$a = array('foo' => 'bar');
echo "<pre>";var_dump(isset($a->foo));echo "</pre>";
echo "<pre>";var_dump(isset($a->asd));echo "</pre>";
echo "<pre>";var_dump(empty($a->foo));echo "</pre>";
echo "<pre>";var_dump(empty($a->asd));echo "</pre>";
echo "<pre>";var_dump(@$a->foo);echo "</pre>";


Expected result:
----------------
Fatal error:  Cannot use array as object in ...

OR

bool(false)

bool(false)

bool(true)

bool(true)

NULL


Actual result:
--------------
bool(true)

bool(false)

bool(false)

bool(true)

NULL

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[2009-11-21 21:13 UTC] tyra3l at gmail dot com

could you show me which ticket duplicates this, and where this behavior is documented in the manual?
because I tried to check this in the documentation, but I haven't found it at the isset/empty manual page.

Tyrael

[2009-11-23 13:28 UTC] jani@php.net

I'm sorry, I read this a bit hastily. This indeed is a bug.

[2009-11-23 14:07 UTC] tyra3l at gmail dot com

Thank you for verifying this.
It was noticed on our development machines, and I tested it on different 
php installations, so I can confirm this is also present on 
5.2.5,5.2.8,5.2.11 also.

Tyrael

[2009-11-24 21:54 UTC] felipe@php.net

This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.