[PHP-DEV] PHP 4.0 Bug #6962 Updated: Unsetting a global object in a function doesn't affect other functions From: Bug Database (php-dev <email protected>)
Date: 10/01/00

ID: 6962
Updated by: waldschrott
Reported By: rubein <email protected>
Status: Closed
Bug Type: Scripting Engine problem
Assigned To:
Comments:

this is intended behaviour and no bug, if you really want to remove it from the global scope, use your workaround

Previous Comments:
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[2000-10-01 06:21:15] rubein <email protected>
Workaround:

Change:

unset($object);

to:

unset($object);
unset($GLOBALS["object"]);

It seems that while changes to the object affect the global instance of it, unsetting it simply removes the global alias from the script. While my suggested workaround works, it would definitely appear to be a bug.

I'm poking into the source and taking a look at this one, but I don't understand the PHP source that well. I'm curious now though.

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[2000-09-30 15:57:46] rubein <email protected>
script:

<?

class TEST {
        var $foo;
}

function one()
{
        global $object;

        $object = new TEST();

        $object->foo = "bar";

        echo "none() dump of object before unsetn";
        var_dump($object);

        unset($object);

        echo "none() dump of object after unsetn";
        var_dump($object);

        two();
}

function two()
{
        global $object;
        echo "ntwo() dump of object after unsetn";
        var_dump($object);
}

echo "<PRE>n";
one();

echo "n(no function) dump of object after unsetn";
var_dump($object);

produces:
one() dump of object before unset
object(test)(1) {
  ["foo"]=>
  string(3) "bar"
}

one() dump of object after unset
NULL

two() dump of object after unset
object(test)(1) {
  ["foo"]=>
  string(3) "bar"
}

(no function) dump of object after unset
object(test)(1) {
  ["foo"]=>
  string(3) "bar"
}

unset()ing an globally defined object within a function doesn't unset it globally - it can still be referred to in other functions.

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Full Bug description available at: http://bugs.php.net/?id=6962 

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