From: cataphract
Operating system: Windows 7 x64; Debian Lenny x64
PHP version: trunk-SVN-2010-09-28 (SVN)
Package: Scripting Engine problem
Bug Type: Bug
Bug description:call_user_func_array still allows call-time pass-by-reference
Description:
------------
zend_call_function does not properly convert references into
non-references, hence allowing passing by reference arguments to functions
that expect values.
See also bug #43484.
This is harder to do with internal function because there's currently a
variable separation for those. However, it's still not impossible, because
if I'm not mistaken there are ways to make the engine give you a variable
with is_ref = 1, refcount <= 1.
I propose making the behavior for internal functions consistent with that
of user functions by separating the variable all time if it's a reference
and the parameter is to be sent by value; for cases where is_ref = 1,
refcount <= 1, the reference flag should be cleared.
Test script:
---------------
<?php
$a = 1;
function test($a) {
$a++;
}
test($a);
echo $a;
call_user_func_array('test', array(&$a));
echo $a;
Expected result:
----------------
11
Actual result:
--------------
12
--
Edit bug report at http://bugs.php.net/bug.php?id=52940&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=52940&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=52940&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=52940&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=52940&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=52940&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=52940&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=52940&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=52940&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=52940&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=52940&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=52940&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=52940&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=52940&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=52940&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52940&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=52940&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=52940&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=52940&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=52940&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=52940&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=52940&r=mysqlcfg
