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Bug #28674 'parent' and 'self' behave differently with call_user_func
Submitted: 2004-06-07 16:18 UTC Modified: 2004-09-08 04:53 UTC
From: nlhowell at cableone dot net Assigned:
Status: Not a bug Package: Class/Object related
PHP Version: 5CVS-2004-06-07 (dev) OS: WinXP Pro 2600 SP1
Private report: No CVE-ID: None
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From: nlhowell at cableone dot net
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 [2004-06-07 16:18 UTC] nlhowell at cableone dot net
Description:
------------
If you use call_user_func(array("parent", "somefunc")), an error is triggered:
call_user_func(parent::x) [function.call-user-func.html]: First argument is expected to be a valid callback

However, doing this with 'self' instead of 'parent' works fine, and behaves as expected.

This may be a recurrence of Bug #26543, in which neither 'parent' nor 'self' could be used in call_user_func, so you might want to take a look at that.

Reproduce code:
---------------
<?php
class P { function __construct() { $args = func_get_args(); print_r($args); } }
class D { function __construct() { $args = func_get_args(); call_user_func_array(array("parent", "__construct")); } }
class C { function __construct() { $args = func_get_args(); call_user_func_array(array("self", "func"), $args); } function func() { $args = func_get_args(); print_r($args); } }
$c = new C(1,2,3,4); // behaves as expected
$d = new D(1,2,3,4); // doesn't behave as expected
?>

Expected result:
----------------
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) 
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) 

Actual result:
--------------
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) 
Warning: call_user_func(parent::x) [function.call-user-func.html]: First argument is expected to be a valid callback in c:\Inetpub\wwwroot\test.php5 on line 3

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AllCommentsChangesGit/SVN commitsRelated reports
 [2004-09-08 04:53 UTC] curt@php.net
In order to use 'parent' the calling class must be extended from a class, and have the method defined.
 
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