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tetafro/PayPal checkout

Created August 2, 2016 18:07
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PayPal PHP checkout example
Raw
README.md

Description

PayPal checkout example in PHP. After payment is done PayPal IPN service sends notification to notify_url (or it can be set in PayPal profile).

Raw
index.html
<!DOCTYPE html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=EDGE" />
<title>PayPal shop</title>
</head>
<body>
<table>
<tr>
<th>Товар</th>
<th>Цена</th>
<th>Купить</th>
</tr>
<tr>
<td>Коробка</td>
<td>10$</td>
<td>
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" name="form-pp">
<input type="hidden" name="business" value="seller@mail.com">
<input type="hidden" name="image_url" value="http://paypal.local/static/logo.png">
<input type="hidden" name="charset" value="utf8">
<input type="hidden" name="item_name" value="Коробка">
<input type="hidden" name="item_number" value="1">
<input type="hidden" name="amount" value="10">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="no_shipping" value="1">
<input type="hidden" name="return" value="http://10.10.10.10/payment-return.php">
<input type="hidden" name="rm" value="2">
<!-- This can be set in PayPal profile -->
<!-- <input type="hidden" name="notify_url" value="http://10.10.10.10/payment-listner.php"> -->
<input type="hidden" name="cancel_return" value="http://10.10.10.10/payment-fail.php">
<input type="submit" value="buy">
</form>
</td>
</tr>
</table>
</body>
</html>
Raw
payment-fail.php
<?php
echo 'The transaction has failed';
Raw
payment-listner.php
<?php
$postdata = ''
$post_json = [];
foreach($_POST as $key => $value) {
$postdata .= $key . '=' . urlencode($value) . '&';
}
$postdata .= 'cmd=_notify-validate';
$curl = curl_init('https://www.sandbox.paypal.com/cgi-bin/webscr');
curl_setopt ($curl, CURLOPT_HEADER, 0);
curl_setopt ($curl, CURLOPT_POST, 1);
curl_setopt ($curl, CURLOPT_POSTFIELDS, $postdata);
curl_setopt ($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt ($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($curl, CURLOPT_SSL_VERIFYHOST, 1);
$response = curl_exec($curl);
if($response == 'VERIFIED') {
file_put_contents('log.txt', $_POST['txn_id'].''\n', FILE_APPEND);
}
curl_close($curl);
Raw
payment-return.php
<?php
$txn_string = file_get_contents('log.txt');
$txn_array = explode("\n", $txn_string);
if(in_array($_POST['txn_id'], $txn_array))
echo 'Success';
else
echo 'Unknown transaction';
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