[PHP-DEV] PHP 4.0 Bug #8937 Updated: unset() in context with GLOBAL

[jmoore]

ID: 8937
Updated by: jmoore
Reported By: [EMAIL PROTECTED]
Old-Status: Open
Status: Closed
Bug Type: Scripting Engine problem
Assigned To: 
Comments:

Have a closer look at

   http://bugs.php.net/bugs.php?id=1971

and the commentary of Zeev. You have to
use unset($GLOBALS["x"]);

-- 
Björn Schotte                        [EMAIL PROTECTED]
http://rent-a-phpwizard.de/          [EMAIL PROTECTED]



Previous Comments:
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[2001-01-26 10:25:19] [EMAIL PROTECTED]
unset() in context with GLOBAL has a serious bug. This bug appeard,
when I changed a PHP3-program to PHP4. The problem is now,
that constructs like the following are several times in this old program.

Sorry, I haven't checked, if this problem is fixed in 4.0.4. If so, perhaps someone 
can tell me? TIA.

Think this problem depends Zend, cause ZEND_CHANGES tells me:

"unset() is no longer a function, but a statement.  It was never
documented as a function so the impact should be no bigger than nada."

I have made a test-case:

<?

function test1 ($dir) {
GLOBAL $x;
        unset($x);
        $x[$dir]=true;
        mydirname($dir);
}


function test2 ($dir) {
GLOBAL $x;
####### unset($x);   no unset!
        $x[$dir]=true;
        mydirname($dir);
}

function mydirname ($dir) {
GLOBAL $x;
        $dir=ereg_Replace('/[^/]*$','',$dir);
        if (!empty($dir)) {
                echo "'$dir'<br>"; flush();
                mydirname($dir);
                $x[$dir]=true;
        }
}

$dir="/hugo/bla/fasel/test"; # first char must be '/' !

unset($x);
test1($dir);
echo "DIRS called with function test1(): "; print_r($x);

echo "<br>";

unset($x);
test2($dir);
echo "DIRS called with function test2(): "; print_r($x);

?>

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Full Bug description available at: http://bugs.php.net/?id=8937


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