ID: 50261
Updated by: j...@php.net
Reported By: tom at tomwardrop dot com
-Status: Open
+Status: Verified
Bug Type: Reproducible crash
-Operating System: Windows 7 x64
+Operating System: *
-PHP Version: 5.3.1
+PHP Version: 5.3, 6
New Comment:
In PHP_5_2 you get this error and no crash:
Warning: call_user_func(parent::__construct): First argument is
expected to be a valid callback..
Previous Comments:
------------------------------------------------------------------------
[2009-11-22 10:08:22] tom at tomwardrop dot com
To clarify, replacing...
call_user_func(array('parent', '__construct'));
...with...
parent::__construct();
...works as expected, hence it's definitely a problem with the
"call_user_func" and "call_user_func_array" functions.
------------------------------------------------------------------------
[2009-11-22 10:05:54] tom at tomwardrop dot com
Description:
------------
If class B, extends Class A, and class B calls Class A's constructor in
its own contructor by using call_user_func("parent", "__construct"), and
if class A's constructor is defined as the class name rather than
"__construct", then PHP seems to crash (which results in Apache 2
crashing). Problem still exists with all extensions disabled.
Reproduce code:
---------------
<?php
class testClass
{
function testClass ()
{
echo 'Output string!';
}
}
class testClass2 extends testClass
{
function __construct ()
{
call_user_func(array('parent', '__construct'));
}
}
new testClass2;
?>
Expected result:
----------------
The above code should echo out the string 'Output string!'. This code
works correctly when "call_user_func" or "call_user_func_array" are not
used.
Actual result:
--------------
call_user_func() and call_user_func_array(), cause PHP and as a result,
Apache 2 to crash. When running PHP DBG debugger, the crash happens on
the execution of call_user_func() line. The Windows event log notes that
httpd.exe (apache) had crashed, blaming php5ts.dll for the fault.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=50261&edit=1
