[RedTurtle]

Ok finally got some more time to look at the code and have it working now:

Using ucwords now instead of my previous method. Let me know if you have any issues with it.

PHP Code:

if (is_subclass_of($this, 'vB_DataManager_ThreadPost') && is_array($this->validfields['title']))
{
    global $exclude_words, $capital_words, $max_length ;
    $exclude_words = array("the","a","of","is"); // Exclude analyzing these words
    $capital_words = array("brb","lol"); // Capital exclusives (leave in lowercase in array)
    $max_length = 5; // Maximum word length, anything over is case-lowered
    
    $this->validfields['title'][VF_CODE] = '
        global $exclude_words, $capital_words, $max_length ;
        $retval = $dm->verify_title($data);

        $words = explode(" ",$data);
        
        foreach ($words as $word) {
 if (!in_array(strtolower($word),$exclude_words))
   {
     if(in_array(preg_replace("/[^a-zA-Z]/","",strtolower($word)),$capital_words))
     $newWord[] = strtoupper($word);
     elseif(strlen($word) >=$max_length && !in_array(strtolower($word),$capital_words)) $newWord[] = ucwords(strtolower($word));
     else $newWord[] = ucwords($word);
   }
 else $newWord[] = strtolower($word);
}

                    
                    $data = implode(" ",$newWord);

        return $retval;
    ';
}