I need some PHP help

General information for the website: Offers Platform
Num. of web pages/modules: 1
Description of every page/module: I have been provided with these instructions and have shown what I've managed to do so far - but am getting stuck due to my basic php ability, so any help greatly appreciated! Thank you in advance!:


The instructions:
First you need to concatenate the current date/time and your campaign identifier together in a pipe separated string. The current date/time (17/03/2014 11:05:31 in this worked example) must be in the format dd/MM/yyyy and your campaign identifier is always 1234 which gives you the following string:
17/03/2014 11:05:31|1234

This string is then encrypted using the encryption key 1234567890123456 with the following encryption function (I have changed the key for security):

<?php

function Encrypt($key, $text)
{
$text = utf8_encode ($text);

$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
$iv = $key;
$ks = 256;
$key = $key;

$text_add = strlen($text)%16;
for($i=$text_add; $i<16; $i++)
{
$text .= chr(16-$text_add);
}

mcrypt_generic_init($td, $key, $iv);

$encrypted = mcrypt_generic($td, $text);

mcrypt_generic_deinit($td);

$hexencrypted = bin2hex($encrypted);

$text_add = 32 - strlen($hexencrypted)%32;
if($text_add != 32)
{
for($i=0; $i

This function should return the following encrypted string:
1234567890123456789012345678901234567890123456789012345678901234 (I have changed for security)


This data then needs to be posted to the url https://www.highstreetsaving.co.uk/OPAGU/FLXHS/Login within a field named CT.

For example:






As the datestamp expires the link you will need to pass the current date/time to actually gain access to the site.



Here is what I have managed to do so far - but my very basic knowledge of php means I'm getting stuck, so any help greatly appreciated!

using this to test the string is correct

function Encrypt($key, $text)
{
$text = utf8_encode ($text);

$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
$iv = $key;
$ks = 256;
$key = $key;

$text_add = strlen($text)%16;
for($i=$text_add; $i<16; $i++)
{
$text .= chr(16-$text_add);
}

mcrypt_generic_init($td, $key, $iv);

$encrypted = mcrypt_generic($td, $text);

mcrypt_generic_deinit($td);

$hexencrypted = bin2hex($encrypted);

$text_add = 32 - strlen($hexencrypted)%32;
if($text_add != 32)
{
for($i=0; $i





<input type="hidden" id="CT" name="CT" value="



Description of requirements/features: I need to make this code work
CMS and Admin requirements: shouldn't be any
Extra notes: Please ask any questions, but hopefully this is very straightforward