TrackChecker

<?php

error_reporting( 0 );

$pwphrase = $_GET['password']; //"JA/tQYM4muRVCHWBP51Lhw==";
$rawSecretKey = explode(',',$_GET['iv']); //array( 52, 111, 70, 98, 71, 119, 50, 47, 69, 118, 114, 122, 47, 69, 49, 53 );

$data = $_GET['data'];
$tz = 'EST';
$dt = new DateTime('now', new DateTimeZone($tz));
$datetime = $dt->format('YmdHis');

$data = str_replace('!datetime!', $datetime, $data);//'RJ123456789CN:20141220041016';
$method = 'AES-128-CBC';
$password = md5($pwphrase, true);
$raw_output = true;

$ivArray = $rawSecretKey;
array_unshift($ivArray, 'C*');
$iv = call_user_func_array(pack, $ivArray);

$encrypted = openssl_encrypt($data, $method, $password, $raw_output, $iv);
echo '<result>'.base64_encode($encrypted).'</result>';