Yet another?

[DeathStar]

Hi I have donations on my website and would like to know how people make scripts that automaticly credit users?

ex.

The site >> Paypal >> The Site (you got what you bought)

[Jessica]

Using Paypal's IPN. You'll have to read their API

[DeathStar]

API?

Please explain.

[superuser2]

Ok, an API is an Application Programming Interface and it's a way for your code to interact with their's. Google it. Paypal has an API that let's your script interact with their's. Once again, google it, or go to Paypal and look for a "Developer's" section.

 

[Jessica]

Did you even think to look at Paypal's site before asking me to explain more? Or searching? You are supposed to try to figure the problem out by researching it before asking questions like that.

 

http://www.google.com/search?q=define:+API

https://www.paypal.com/IntegrationCenter/ic_home.html

[DeathStar]

I did :|

what i meant is how would i use somethin g liek this in my code to make it work

 

PHP 4.1

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

foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&$key=$value";
}

// 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);

// 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'];

if (!$fp) {
// HTTP ERROR
} else {
fputs ($fp, $header . $req);
while (!feof($fp)) {
$res = fgets ($fp, 1024);
if (strcmp ($res, "VERIFIED") == 0) {
// check the payment_status is Completed
// check that txn_id has not been previously processed
// check that receiver_email is your Primary PayPal email
// check that payment_amount/payment_currency are correct
// process payment
}
else if (strcmp ($res, "INVALID") == 0) {
// log for manual investigation
}
}
fclose ($fp);
}
?>

[Jessica]

We can't tell that without seeing your code. This is really a third-party question too.

[DeathStar]

at this moment i only have a page with paypal buttons

[AndyB]

PayPal has reams of information about this.

 

There's a paypal forum at www.paypaldev.org that should get you a fast answer to a specific problem, and you can always sign up for the PayPal sandbox (test environment) at https://developer.paypal.com

[DeathStar]

ok thanks