From:
Operating system: Windows 7
PHP version: 5.3.6
Package: Scripting Engine problem
Bug Type: Bug
Bug description:@ Error control operator prevents creation of variable
Description:
------------
When a function is defined with a parameter that is passed by reference,
calling the function with a variable that has not been previously set will
create that variable (and trigger a warning). After the function is called
that variable exists (won't trigger warnings) and holds null or whatever
value the function assigned to it.
If you try to suppress the warning for the variable that doesn't exist at
call time, it will not be created, and trying to access it after the
function triggers warnings.
It works as expected if you suppress errors on the function call but this
is not desirable because it will also hide other errors.
Test script:
---------------
<?php
function foo(&$bar) {
$bar = 'woo';
}
@foo($x);
foo(@$y);
var_dump($x, $y);
Expected result:
----------------
string(3) "woo"
string(3) "woo"
Actual result:
--------------
Notice: Undefined variable: y in FILE on line LINE
string(3) "woo"
NULL
--
Edit bug report at https://bugs.php.net/bug.php?id=55278&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=55278&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=55278&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=55278&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=55278&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=55278&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=55278&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=55278&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=55278&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=55278&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=55278&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=55278&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=55278&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=55278&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=55278&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=55278&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=55278&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=55278&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=55278&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=55278&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=55278&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=55278&r=mysqlcfg
