Passing by reference

[filburt1]

http://www.php.net/manual/en/language.references.unset.php

So, what if I want to destroy the variable that was passed to a function?

function executeFilterAction(&$message, $filter)
{
$subject = htmlspecialchars_uni($message['subject']);

switch ($filter['tofolderid'])
{
case VBMS_FILTER_TOFOLDERID_DELETE:
debugecho("Message "$subject" will be deleted");
unset($message);
break;

case VBMS_FILTER_TOFOLDERID_MARKASREAD:
debugecho("Message "$subject" will be marked as read");
$message['readflag'] = true;
break;

default:
debugecho("Message "$subject" will be moved to folderid " .
$filter['tofolderid']);
$message['folderid'] = $filter['tofolderid'];
break;
}

return false;
}

Note that VBMS_FILTER_TOFOLDER_DELETE case and what it does.

[filburt1]

Nobody has an idea on this...

[Velocd]

$a = 5;
$b =& $a;

echo $a;
echo '<br />';
echo $b;

unset($a);

echo $a;
echo '<br />';
echo $b;

Returns:


5
5
5

With $a eliminated.

$a = 5;
$b =& $a;

echo $a;
echo '<br />';
echo $b;

$a = '';

echo $a;
echo '<br />';
echo $b;


Returns:


5
5


Some kind of PHP quirk perhaps.

[filburt1]

Note that it is in a function.

[Velocd]

Note that it is in a function.
Yes, I noted. It isn't possible then, since any variable outside of a function is out of scope unless it's a global.

Maybe calling another function and unsetting the variable, or if it was part of a class unset its member variable of the object.

* Velocd shrugs