1. Go to this page and download the library: Download mercanpay/mercanpay-php library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
mercanpay / mercanpay-php example snippets
use MercanPay\MercanPay;
use MercanPay\MercanPayException;
$zp = new MercanPay('https://mercanpay.com', getenv('MERCANPAY_API_KEY'));
// Invoice priced in USD — the customer picks the coin on the payment page
$invoice = $zp->createUsdInvoice('25', ['order_id' => 'order-1000']);
// Checkout in a fixed coin: create an invoice and redirect the customer to the hosted payment page
$invoice = $zp->createInvoice('USDT', '49.90', [
'order_id' => 'order-1001', // idempotent: retries return the same invoice
'callback_url' => 'https://shop.example/mercanpay-webhook.php',
'metadata' => ['customer_id' => 42],
]);
header('Location: ' . $invoice['payment_url']);
$body = file_get_contents('php://input');
if (!MercanPay::verifyWebhook(getenv('MERCANPAY_WEBHOOK_SECRET'), $body, $_SERVER['HTTP_X_MERCANPAY_SIGNATURE'] ?? '')) {
http_response_code(401);
exit;
}
$event = json_decode($body, true);
if ($event['type'] === 'invoice.paid' || $event['type'] === 'invoice.overpaid') {
$orderId = $event['data']['invoice']['order_id'];
// mark order as paid — make this idempotent: the same event id can be delivered more than once
}
http_response_code(200);