Passing by reference

[filburt1]

http://www.php.net/manual/en/languag...nces.unset.php

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

PHP Code:

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]

PHP Code:

    $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.

PHP Code:

    $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]

Originally Posted by filburt1

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.

[high]* Velocd shrugs[/high]