"; $req .= ""; $req .= "" . $trackingUserID . "" . $trackingPassword . "3.1"; for ($i = 1; $i <= 2; $i++) : $testID = "test" . pad($i, 4, "0"); $req .= "" . $testID . ""; endfor; $req .= ""; $req = urlencode($req); header("Location: tracking_amazon.php?trackingReq=" . $req); ?>