USD paynow integration

#1

I am trying to implement a USD paynow integration for my website. Please may I be assisted

#2

Good day and thank you for contacting us. Our sincere apologies for the delayed response.

The following methods may prove useful whilst integrating your site with Paynow. You can create a separate integration,

  1. CreateHash
    This method will create a hash value sent in any HTTP POST between the merchant site and Paynow.

PHP

function CreateHash($values, $MerchantKey){
$string = “”;
foreach($values as $key=>$value) {
if( strtoupper($key) != “HASH” ){
$string .= $value;
}
}
$string .= $MerchantKey;

$hash = hash(“sha512”, $string);
return strtoupper($hash);
}

  1. UrlIfy
    This method will create a string of key-value pairs in the form key1=value1&key2=value2.

PHP

function UrlIfy($fields) {
//url-ify the data for the POST
$delim = “”;
$fields_string = “”;
foreach($fields as $key=>$value) {
$fields_string .= $delim . $key . ‘=’ . $value;
$delim = “&”;
}

return $fields_string;
}

  1. CreateMsg
    This method will urlencode and format your cURL POST fields into one string for posting to Paynow. It calls CreateHash and UrlIfy methods to do this.

PHP

function CreateMsg($values, $MerchantKey){
$fields = array();
foreach($values as $key=>$value) {
$fields[$key] = urlencode($value);
}

$fields[“hash”] = urlencode($this->CreateHash($values, $MerchantKey));

$fields_string = $this->UrlIfy($fields);
return $fields_string;
}

  1. ParseMsg
    Will convert a message of the form created by CreateMsg back into an associative array / dictionary.

PHP

function ParseMsg($msg) {
//convert to array data
$parts = explode("&",$msg);
$result = array();
foreach($parts as $i => $value) {
$bits = explode("=", $value, 2);
$result[$bits[0]] = urldecode($bits[1]);
}

return $result;
}