Bug #69747 [Opn]: recursive invocation of call_user_func loses object state
| From: | cmb@php.net | Date: | Fri, 05 Jun 2015 23:07:23 +0000 |
| Subject: | Bug #69747 [Opn]: recursive invocation of call_user_func loses object state | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-193160@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=69747&edit=1
ID: 69747
Updated by: cmb@php.net
Reported by: remyfox at hotmail dot com
Summary: recursive invocation of call_user_func loses object
state
Status: Open
Type: Bug
Package: Unknown/Other Function
Operating System: Windows 8
PHP Version: 5.6.9
Block user comment: N
Private report: N
New Comment:
FWIW: this issue is already fixed in master, see
<http://3v4l.org/gAkh8>. I'm not sure whether it
should be
back-ported.
Previous Comments:
------------------------------------------------------------------------
[2015-06-02 14:55:22] remyfox at hotmail dot com
Description:
------------
Calling call_user_func(_array) more than one level deep will no longer take into account the
callback object's state. E.g.
call_user_func("call_user_func", $callback);
I am not entirely certain this is a bug: after all, usually once a function is called, an
object's environment is left. However, call_user_func seems to be the exception to this rule,
because the function would lose its significance otherwise.
Test script:
---------------
Anyway,
class A {
private function z() {
echo __METHOD__;
}
public function x() {
$callback = [[new $this(), "z"], []];
$callback[0](...$callback[1]);
}
}
(new A())->x();
// This works fine and can be rewritten to:
class A {
private function z() {
echo __METHOD__;
}
public function x() {
$callback = [[new $this(), "z"], []];
call_user_func_array("call_user_func_array", $callback);
}
}
(new A())->x();
Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot access private
method A::z() in FILE.
Expected result:
----------------
Stacked invocation of call_user_func(_array) should not leave the callback object's state.
Actual result:
--------------
Stacked invocation of call_user_func(_array) leaves the callback object's state.
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=69747&edit=1