if (isset($_GET['pattern'])) { $pattern=$_GET['pattern']; }
if (isset($_POST['pattern'])) { $pattern=$_POST['pattern']; }
-$tokens=split(" ",$pattern);
+$tokens=explode(" ",$pattern);
function token_filter ($t) { $t = trim($t); if (empty($t)) return false; return true; }
$tokens=array_filter($tokens, "token_filter");