#42937 [Com]: __call() method not invoked when methods are called on parent from child class

[judas dot iscariote at gmail dot com]

 ID:               42937
 Comment by:       judas dot iscariote at gmail dot com
 Reported By:      jmaxwilson at sixteensmallstones dot org
 Status:           Open
 Bug Type:         Scripting Engine problem
 Operating System: Windows XP
 PHP Version:      5.2.4
 New Comment:

This is fixed in 5_3 but you have to define __callstatic like this


<?php
class A {
    function __call($strMethod, $arrArgs) {
                return "PHP " .phpversion();
    }
    
    static function __callstatic($strMethod, $arrArgs)
    {
         return "PHP " .phpversion();
    }
}

class B extends A {
    function getVersion() {
        return parent::getVersion() . " Rocks!";
    }
}

$A = new A();
echo $A->getVersion() . "<br/>";

$B = new B();
echo $B->getVersion() . "<br/>";
?>


Previous Comments:
------------------------------------------------------------------------

[2007-10-11 23:08:54] jmaxwilson at sixteensmallstones dot org

Description:
------------
If __call() is used to implement a method in a parent class, and the
method is overridden in an inherited child class using a real method
declaration that calls parent::methodName(), __call() is never invoked
and PHP reports a fatal error saying that the method is undefined.

You can work around the bug by replacing parent::methodName() with
parent::__call('methodName',null), but it means that you have to know
which of the parent's methods are implemented using __call() in order to
override them in a child class.

The child class should be agnostic to whether the parent's methods are
real or magic.

This bug was reported in PHP5.1 RC1
(http://bugs.php.net/bug.php?id=34739) but was improperly marked as
bogus with the explanation that "__call() is not used when calling
static methods."  The use of the paamayim-nekudotayim (::) with the
parent keyword is not to resolve static scope but to resolve inherited
scope for an overridden method, therefore the issue should be
reconsidered.

Reproduce code:
---------------
<?php
class A {
        function __call($strMethod, $arrArgs) {
                                return "PHP " .phpversion();
        }
}

class B extends A {
        function getVersion() {
                return parent::getVersion() . " Rocks!";
        }
}

$A = new A();
echo $A->getVersion() . "<br/>";

$B = new B();
echo $B->getVersion() . "<br/>";
?>

Expected result:
----------------
PHP 5.2.4
PHP 5.2.4 Rocks!

Actual result:
--------------
PHP 5.2.4

Fatal error: Call to undefined method A::getversion() in
C:\www\test.php on line 10


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


-- 
Edit this bug report at http://bugs.php.net/?id=42937&edit=1