Edit report at https://bugs.php.net/bug.php?id=53727&edit=1

 ID:                 53727
 Comment by:         jbondc at openmv dot com
 Reported by:        mattknight at xymail dot co dot uk
 Summary:            Inconsistent behavior of is_subclass_of with
                     interfaces
 Status:             Closed
 Type:               Bug
 Package:            Class/Object related
 Operating System:   Gentoo x86_64
 PHP Version:        5.3.5
 Assigned To:        dmitry
 Block user comment: N
 Private report:     N

 New Comment:

This patch also modifies the is_a() api by allowing a string as a first 
argument.

That seems wrong to me within the 5.3 branch.


Previous Comments:
------------------------------------------------------------------------
[2011-07-15 15:17:18] phi...@php.net

Automatic comment from SVN on behalf of philip
Revision: http://svn.php.net/viewvc/?view=revision&revision=313271
Log: Updated is_a() and is_subclass_of() tests as per the removed E_WARNING 
from r313162 which was inspired by discussion after r312904 and PHP Bug #53727

------------------------------------------------------------------------
[2011-07-04 11:00:53] dmi...@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.



------------------------------------------------------------------------
[2011-07-04 10:55:39] dmi...@php.net

Automatic comment from SVN on behalf of dmitry
Revision: http://svn.php.net/viewvc/?view=revision&revision=312904
Log: Fixed bug #53727 (Inconsistent behavior of is_subclass_of with interfaces)

------------------------------------------------------------------------
[2011-06-30 18:45:09] ralph at smashlabs dot com

Dmitry,

The patch called fix-is_subclass_of-PHP_5_3.diff does the following:

* Alters the existing Zend/tests/is_a.phpt to alter the bad
  expectation,

* Adds a new test file for is_subclass_of() as 
  Zend/tests/is_subclass_of.phpt

* Finally alters is_a_impl() in the following ways:

  * If an object was provided as the first parameter, and we are
    inside of an is_subclass_of call (known by the flag
    only_subclass), then assign the class entry of the object

  * Next, determine if the instance_ce provided is the same class
    entry as that we are testing against (parameter 2 of the
    is_subclass_of() call ... if it is, return false

  * Now that we know the instance_ce is not the same as the class
    entry for the test class, allow is_a_impl to pass these class
    entries to instanceof_function, and return that value

It is pretty straight forward, and any way I look at it, there are
few consequences to this patch.

Thanks,
Ralph

------------------------------------------------------------------------
[2011-01-13 09:13:50] mattknight at xymail dot co dot uk

Yes, it would also be fine to return false when comparing against an ancestral 
interface, just so long as the behaviour is consistent.

Expected result:
----------------
false
true
false
true

------------------------------------------------------------------------


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the rest of the comments, please view the bug report online at

    https://bugs.php.net/bug.php?id=53727


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