From:
Operating system: Gentoo x86_64
PHP version: 5.3.5
Package: Class/Object related
Bug Type: Bug
Bug description:Inconsistent behavior of is_subclass_of with interfaces
Description:
------------
is_subclass_of() can take a string as the first parameter, as well as a
second string parameter of the class name. It will check to see whether a
class with the name specified in the first parameter is a subclass of the
class with the name specified in the second parameter.
This logic, however, doesn't apply with interfaces.
The function behaves as expected for classes that don't directly implement
an interface, but won't recognise the interface on a class that does
directly implement it.
Test script:
---------------
<?php
interface MyInterface {
const TEST_CONSTANT = true;
}
class ParentClass implements MyInterface { }
class ChildClass extends ParentClass { }
echo (is_subclass_of('ChildClass', 'MyInterface') ? 'true' : 'false') .
"\n";
echo (defined('ChildClass::TEST_CONSTANT') ? 'true' : 'false') . "\n";
echo (is_subclass_of('ParentClass', 'MyInterface') ? 'true' : 'false') .
"\n";
echo (defined('ParentClass::TEST_CONSTANT') ? 'true' : 'false') . "\n";
Expected result:
----------------
true
true
true
true
Actual result:
--------------
true
true
false
true
--
Edit bug report at http://bugs.php.net/bug.php?id=53727&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53727&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53727&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53727&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53727&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53727&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53727&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53727&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53727&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53727&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53727&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53727&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53727&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53727&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53727&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53727&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53727&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53727&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53727&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53727&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53727&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53727&r=mysqlcfg
