Paypal PHP Integration Beispiel

CREATE TABLE `products` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `image` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `price` float(10,2) NOT NULL,
 `status` tinyint(1) NOT NULL DEFAULT '1',
 PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `payments` (
 `payment_id` int(11) NOT NULL AUTO_INCREMENT,
 `item_number` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `txn_id` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `payment_gross` float(10,2) NOT NULL,
 `currency_code` varchar(5) COLLATE utf8_unicode_ci NOT NULL,
 `payment_status` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
 `date` datetime NOT NULL,
 PRIMARY KEY (`payment_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

<?php

$servername = "localhost";
$username = "XXXXXX";
$password = "XXXXXX";
$database = "XXXXXX";

$mysqli = new mysqli($servername, $username, $password, $database);
$mysqli->set_charset("utf8");

// check connection
if ($mysqli->connect_errno) {
 die("Connect failed: ".$mysqli->connect_error);
}

?>

<?php
//Include DB configuration file
include 'dbconnect.php';

//Set useful variables for paypal form
$paypalURL = 'https://www.sandbox.paypal.com/cgi-bin/webscr'; //Test PayPal API URL
$paypalID = 'seller@DOMAINNAME.de'; //Business Email

$usermail = $idarray->email;

?>
<?php
 //Fetch products from the database
 $results = $mysqli->query("SELECT * FROM products");
 while($row = $results->fetch_assoc()){
?>
 Name: <?php echo $row['name']; ?><br>
 Preis: <?php echo $row['price']; ?>€
 <form action="<?php echo $paypalURL; ?>" method="post">
 <!-- Identify your business so that you can collect the payments. -->
 <input type="hidden" name="business" value="<?php echo $paypalID; ?>">

<!-- Specify a Buy Now button. -->
 <input type="hidden" name="cmd" value="_xclick">

<!-- Specify details about the item that buyers will purchase. -->
 <input type="hidden" name="item_name" value="<?php echo $row['name']; ?>">
 <input type="hidden" name="item_number" value="<?php echo $row['id']; ?>">
 <input type="hidden" name="amount" value="<?php echo $row['price'] . '€'; ?>"/>
 <input type="hidden" name="currency_code" value="EUR">

<!-- Specify URLs -->
 <input type='hidden' name='cancel_return' value='https://DOMAINNAME.de/cancel.php'>
 <input type='hidden' name='return' value='https://DOMAINNAME.de/success.php'>
 <input type='hidden' name='notify_url' value='https://DOMAINNAME.de/ipn.php'>

<!-- Display the payment button. -->
 <input type="image" name="submit" border="0"
 src="images/paypal-button-de.gif" alt="PayPal - The safer, easier way to pay online">
 <img alt="" border="0" width="1" height="1" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" >
 </form><br><br>
<?php } ?>

<form action="<?php echo $paypalURL; ?>" method="post"></form>

<?php
include 'dbconnect.php';

//Get payment information from PayPal
$item_number = $_GET['item_number'];
$txn_id = $_GET['tx'];
$payment_gross = $_GET['amt'];
$currency_code = $_GET['cc'];
$payment_status = $_GET['st'];

//Get product price from database
$productResult = $mysqli->query("SELECT price FROM products WHERE id = ".$item_number);
$productRow = mysqli_fetch_object($productResult);
$productPrice = $productRow->price;

if(!empty($txn_id) && $payment_gross == $productPrice){
 //Check if payment data exists with the same TXN ID.
 $prevPaymentResult = $mysqli->query("SELECT payment_id FROM payments WHERE txn_id = '".$txn_id."'");
?>
 <h1>Your payment has been successful.</h1>
 Please wait a few minutes for the transaction to be verified.<br>
 Then you can directly use your product.
<?php }else{ ?>
 <h1>Your payment has failed.</h1>
<?php } ?>

<h1>Your PayPal transaction has been canceled.</h1>

<?php
//Include DB configuration file
include 'dbconnect.php';

/*
 * Read POST data
 * reading posted data directly from $_POST causes serialization
 * issues with array data in POST.
 * Reading raw POST data from input stream instead.
 */
$raw_post_data = file_get_contents('php://input');
$raw_post_array = explode('&', $raw_post_data);
$myPost = array();
foreach ($raw_post_array as $keyval) {
 $keyval = explode ('=', $keyval);
 if (count($keyval) == 2)
 $myPost[$keyval[0]] = urldecode($keyval[1]);
}

// Read the post from PayPal system and add 'cmd'
$req = 'cmd=_notify-validate';
if(function_exists('get_magic_quotes_gpc')) {
 $get_magic_quotes_exists = true;
}
foreach ($myPost as $key => $value) {
 if($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
 $value = urlencode(stripslashes($value));
 } else {
 $value = urlencode($value);
 }
 $req .= "&$key=$value";
}

/*
 * Post IPN data back to PayPal to validate the IPN data is genuine
 * Without this step anyone can fake IPN data
 */
$paypalURL = "https://www.sandbox.paypal.com/cgi-bin/webscr";
$ch = curl_init($paypalURL);
if ($ch == FALSE) {
 return FALSE;
}
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_SSLVERSION, 6);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);

// Set TCP timeout to 30 seconds
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close', 'User-Agent: company-name'));
$res = curl_exec($ch);

/*
 * Inspect IPN validation result and act accordingly
 * Split response headers and payload, a better way for strcmp
 */
$tokens = explode("\r\n\r\n", trim($res));
$res = trim(end($tokens));
date_default_timezone_set('Europe/Berlin');
$date = date("Y-m-d H:i:s");

if (strcmp($res, "VERIFIED") == 0 || strcasecmp($res, "VERIFIED") == 0) {

//Payment data
 $item_number = $_POST['item_number'];
 $txn_id = $_POST['txn_id'];
 $payment_gross = $_POST['mc_gross'];
 $currency_code = $_POST['mc_currency'];
 $payment_status = $_POST['payment_status'];

//Check if payment data exists with the same TXN ID.
 $prevPayment = $mysqli->query("SELECT payment_id FROM payments WHERE txn_id = '".$txn_id."'");
 if($prevPayment->num_rows > 0){
 exit();
 }else{
 //Insert tansaction data into the database
 $insert = $mysqli->query("INSERT INTO payments(item_number,txn_id,payment_gross,currency_code,payment_status,date) VALUES('".$item_number."','".$txn_id."','".$payment_gross."','".$currency_code."','".$payment_status."','".$date."')");

}

}

$paypalURL = 'https://www.paypal.com/cgi-bin/webscr'; // echte paypal url
$paypalID = 'seller@DOMAINNAME.de'; //echte email vom richtigen paypal account

$paypalURL = "https://www.paypal.com/cgi-bin/webscr";