function cutS($string)
{
 $s = split(" ", $string);
 $puffer = "";
 while (list($k,$v) =each($s))
 {
   if (v$!=strtolower($v)
     $puffer .= $v." ";
 }
 return substr($puffer, 0, strlen($puffer)-1);
}

$string = preg_replace('/(\W)[^A-Z]+(\W)/m', '\1\2', $string);

$string = preg_replace('/(\W)[^A-Z]\w*(\W)/m', '\1\2', $string);