Passing Variables to a URL

[millsy007]

I have some code that I dont exactly undertsand and wanted some help adding to.

 

I believe this code uses an external link (paypal) and passes additional variables to the URL?

 

// post back to PayPal system to validate	
$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);


// assign posted variables to local variables
$item_name 			= $_POST['item_name'];
$item_number 		= $_POST['item_number'];
$payment_status 	= $_POST['payment_status'];
$payment_amount 	= $_POST['mc_gross'];
$payment_currency 	= $_POST['mc_currency'];
$txn_id 			= $_POST['txn_id'];
$receiver_email 	= $_POST['receiver_email'];
$payer_email 		= $_POST['payer_email'];
$custom 			= $_POST['custom'];

if (!$fp) {
// HTTP ERROR
} else {

 

Could I simply add to the URL by passing in an additional variable?

[trq]

What you have posted retrieves variables posted to it via a form, it doesn't actually do anything with them that we can see.

[millsy007]

Okay apologies I think I posted the wrong function perhaps.

Is this the part that carries out the functionality I described?

 

function pdt_response(){

// read the post from PayPal system and add 'cmd'
$req 		= 'cmd=_notify-synch';

$tx_token 	= $_GET['tx'];
$auth_token = get_option('wps_paypal_pdttoken');
$req 		.= "&tx=$tx_token&at=$auth_token";

// post back to PayPal system to validate
$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";
$fp 	= fsockopen ('www.paypal.com', 80, $errno, $errstr, 30);
// If possible, securely post back to paypal using HTTPS
// Your PHP server will need to be SSL enabled
// $fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);

if (!$fp) {
	// HTTP ERROR
} else {
	fputs ($fp, $header . $req);
	// read the body data 
	$res = '';
	$headerdone = false;
	while (!feof($fp)) {
		$line = fgets ($fp, 1024);
		if (strcmp($line, "\r\n") == 0) {
			// read the header
			$headerdone = true;
		}
		elseif ($headerdone)
		{
			// header has been read. now read the contents
			$res .= $line;
		}
	}

	// parse the data
	$lines 		= explode("\n", $res);
	$keyarray 	= array();
	if (strcmp ($lines[0], "SUCCESS") == 0) {
		for ($i=1; $i<count($lines);$i++){
			list($key,$val) = explode("=", $lines[$i]);
			$keyarray[urldecode($key)] = urldecode($val);
		}


		$PDT_DATA 	= array();

		$PDT_DATA[firstname] 		= $keyarray['first_name'];
		$PDT_DATA[lastname] 		= $keyarray['last_name'];
		$PDT_DATA[itemname] 		= $keyarray['item_name'];
		$PDT_DATA[amount] 			= $keyarray['mc_gross'];
		$PDT_DATA[currency] 		= $keyarray['mc_currency'];	

		$PDT_DATA[payment_status]	= $keyarray['payment_status']; 
		$PDT_DATA[payment_type] 	= $keyarray['payment_type'];
		$PDT_DATA[pending_reason] 	= $keyarray['pending_reason'];
		$PDT_DATA[who] 				= $keyarray['custom'];



		$ERROR 		= 0;