#28269 [Opn]: Incomplete error message when instantiating child classes of an abstract class

[phpbug at gb404 dot com]

 ID:               28269
 User updated by:  phpbug at gb404 dot com
 Reported By:      phpbug at gb404 dot com
 Status:           Open
 Bug Type:         Zend Engine 2 problem
-Operating System: Gentoo Linux 2.4.23
+Operating System: *
 PHP Version:      5.0.0RC2
 New Comment:

This is not specific to linux


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

[2004-05-04 03:43:23] phpbug at gb404 dot com

Description:
------------
When I try to instantiate a class which extends an abstract class but
without implemented all defined abstract functions, this class becomes
abstract too and fatal error message returned doesn't give any reason.

Then it is very difficult to find which abstract function is not
implemented as defined in the abstract parent class when there is a lot
of abstract functions to implement.

Is it possible to display a list of the missing function after the
actual error message ?

Reproduce code:
---------------
<?php
        abstract class a
        {
                abstract function foo();
                abstract function bar();
        }

        class b extends a
        {
                function foo() {
                        return "I am the foo function";
                }
        }

        $obj = new b();
?>

Expected result:
----------------
Fatal error: Cannot instantiate class b, abstract function parent::bar
not implemented in /absolute/path/to/my/file/b.php on line 15

Actual result:
--------------
Fatal error: Cannot instantiate abstract class b in
/absolute/path/to/my/file/b.php on line 15


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


-- 
Edit this bug report at http://bugs.php.net/?id=28269&edit=1