[Flep]

@ buro9
I fixed it.
I am using the following classes:
http://code.google.com/p/bitly/
http://twitter.slawcup.com/twitter.class.phps
My vbulletin plugin becomes:

PHP Code:

$excludedForums = array(0); 
     
    if (!in_array($foruminfo[forumid], $excludedForums)) { 
        $shortUrl = 'http://www.yourforumsdomain.com/showthread.php?t='.$newpost[threadid];
     
        include 'BitLy.php'; 
        $bitly = new Bitly('<bit.ly username>', '<bit.ly API key>'); 
        $shortUrl = $bitly->shortenSingle($shortUrl);  
     
        $tweet = ''; 
        if (isset($newpost['prefixid']) && $newpost['prefixid'] != '') { 
            $tweet = $vbphrase['prefix_'.$newpost['prefixid'].'_title_plain'].' '; 
        } 
        $tweet .= $newpost['title'].' '.$shortUrl;
     
    include 'twitter.php'; 
    $t= new twitter();  
    $t->username='twitter username';  
    $t->password='twitter password';  
    $t->update($tweet); 
    }