<?php
$dateTime = date('Y:m:d-H:i:s');

function getDateTime(){
	global $dateTime;
	return $dateTime;
}
/*
	Function that calculates the hash of the following parameters:
	 - Store Id
	 - Date/Time(see $dateTime above)
	 - chargetotal
	 - shared secret
*/
function createHash($storeid, $chargetotal, $currency, $sharedsecret){
	$stringtohash = $storeid . getDateTime() . $chargetotal . $currency . $sharedsecret;
	$ascii = bin2hex($stringtohash);
	return sha1($ascii);
}
?>