| DNOA Member Name: Matthew Holt Location: 127.0.0.1 Join Date: May 2004
Posts: 4,850
NP$: 17.21 ( Donate)
| PayPal Transaction Information on Return
Found a script here: http://paypaltech.com/PDTGen/
Not sure if it's been posted before but some folks here might find it helpful. Set a return URL in your Profile settings at PayPal (enable it too, of course) and put the code you get in that URL on your server.
Customers will also see this page after the transaction is complete.
Most people use PHP here, so I'll post that code for you to use. Be sure to read the comments for info.
The difference between live transactions and sandbox in this script is just the URLs the data is posted to and received from, really... not much difference, but I put extra useful comments in this first snippet of code; refer to them if you use the second snippet so you know what to do.
REAL TRANSACTIONS (real monetary transactions) PHP Code: <?php
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-synch';
$tx_token = $_GET['tx'];
// ** GET YOUR PRIVATE AUTH TOKEN FROM PP PROFILE, PUT IT HERE ** //
$auth_token = "put auth token here";
$req .= "&tx=$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
$headerdone = true;
}
else if ($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);
}
// DON'T FORGET TO DO ALL THESE THINGS.
// FOR LIST OF VARIABLES, SEE: https://www.paypal.com/IntegrationCenter/ic_ipn-pdt-variable-reference.html
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
// TO PROCESS, DO WHAT YOU WANT TO DO. ADD TO DB, UPDATE IT, etc.
$firstname = $keyarray['first_name'];
$lastname = $keyarray['last_name'];
$itemname = $keyarray['item_name'];
$amount = $keyarray['mc_gross'];
// THIS SHOULD ALL BE CUSTOMIZED FOR YOUR OWN PROJECT.
echo ("<p><h3>Thank you for your purchase!</h3></p>");
echo ("<b>Payment Details</b><br>\n");
echo ("<li>Name: $firstname $lastname</li>\n");
echo ("<li>Item: $itemname</li>\n");
echo ("<li>Amount: $amount</li>\n");
echo ("");
}
else if (strcmp ($lines[0], "FAIL") == 0) {
// log for manual investigation
}
}
fclose ($fp);
?>
<!-- You are required by PayPal's TOS to include this line visibly to customer. -->
Your transaction has been completed, and a receipt for your purchase has been emailed to you.<br>You may log into your account at <a href='https://www.paypal.com'>www.paypal.com</a> to view details of this transaction.<br>
SANDBOX (not real money; use for development testing) PHP Code: <?php
// read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-synch';
$tx_token = $_GET['tx'];
$auth_token = "auth code here";
$req .= "&tx=$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.sandbox.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.sandbox.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
$headerdone = true;
}
else if ($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);
}
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
$firstname = $keyarray['first_name'];
$lastname = $keyarray['last_name'];
$itemname = $keyarray['item_name'];
$amount = $keyarray['mc_gross'];
echo ("<p><h3>Thank you for your purchase!</h3></p>");
echo ("<b>Payment Details</b><br>\n");
echo ("<li>Name: $firstname $lastname</li>\n");
echo ("<li>Item: $itemname</li>\n");
echo ("<li>Amount: $amount</li>\n");
echo ("");
}
else if (strcmp ($lines[0], "FAIL") == 0) {
// log for manual investigation
}
}
fclose ($fp);
?>
Your transaction has been completed, and a receipt for your purchase has been emailed to you.<br>You may log into your account at <a href='https://www.paypal.com'>www.paypal.com</a> to view details of this transaction.<br>
If you have questions feel free to ask. 
.chulium.
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