Member Avatar for php2sheik

Hi all,

How to integrate Payment Gateway in php?

Please send the PHP script for payment gateway integration or any other useful links for this?

Thanks in advance

  • 6 Contributors
  • 5 Replies
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  • 5 Years Discussion Span
  • Latest Post Latest Post by Sudhir_1

Dani AI

Generated

A short, practical plan for (and anyone following this thread): pick a gateway, register for a merchant account and sandbox keys, choose the integration type (hosted/redirect or API/tokenization), implement server-side verification (webhooks/IPN), test thoroughly in sandbox, then go live. As noted, the gateway will give you the values and the endpoints — that is the starting point. ()

Two common patterns and a minimal PHP redirect example:

  • Hosted redirect / checkout (fast, lower PCI burden): your server builds the required form fields and redirects the customer to the gateway’s hosted page.
  • API / tokenized flow (more control, more complexity): collect a token (via client JS or hosted field) and charge from the server.

Example minimal redirect (replace variables with the gateway’s parameter names):

<?php
$gatewayUrl = 'https://gateway.example.com/pay'; // gateway endpoint
$params = [
  'merchant_id'  => 'MERCHANT_ID',
  'order_id'     => 'ORDER123',
  'amount'       => '9.99',
  'currency'     => 'USD',
  'redirect_url' => 'https://your-site.example.com/response.php'
];
echo '<form id="pg" action="'.htmlspecialchars($gatewayUrl).'" method="post">';
foreach ($params as $k=>$v) {
  echo '<input type="hidden" name="'.htmlspecialchars($k).'" value="'.htmlspecialchars($v).'">';
}
echo '</form><script>document.getElementById("pg").submit();</script>';
?>

Always verify asynchronous notifications (webhooks/IPN). Example PHP HMAC check (many gateways publish a signing secret and a signature header; check the gateway’s docs and header name):

<?php
$payload = @file_get_contents('php://input');
$sig     = $_SERVER['HTTP_X_GATEWAY_SIGNATURE'] ?? '';
$secret  = 'your_webhook_secret';
$expected = hash_hmac('sha256', $payload, $secret);
if (!hash_equals($expected, $sig)) {
  http_response_code(400);
  exit;
}
// safe to parse $payload JSON and update order state
?>

Security, testing and troubleshooting notes:

  • Never store CVV or full magnetic-track data; sensitive auth data must not be retained after authorization. Follow PCI guidance. (pcisecuritystandards.org)
  • Use hosted checkout or tokenization (Stripe Checkout/Elements, gateway-hosted forms) to reduce PCI scope. Test in sandbox with test keys and cards; don’t mix live and test credentials. ()
  • If using India-focused providers mentioned earlier (CCAvenue, or Citrus as called out by and ), use the provider’s merchant dashboard and integration kit and note that Citrus was acquired into PayU (check the vendor docs/support). (ccavenue.com)

Quick checklist: HTTPS everywhere, keep API keys out of VCS, log raw gateway responses for debugging, handle idempotency for retries, and validate every webhook before updating order status.

Recommended Answers

All 5 Replies

Member Avatar for somedude3488

Depends on the gateway you want to use. Which one are you talking about?

Member Avatar for Shanti C

First you need to register with payment gate way service providers to make it work on your site..Then they will tell you the information for integration..which is not difficult : just send proper values to specified path which differs for different payment gateways..

Member Avatar for Ahmed2614

We are using citrus gateway payment pls help

Member Avatar for Sudhir_1

CCAvenue payment integration php
Integrating CCavenue payment gateway is simple
We need a merchant id and working for implementing payment gateway

check link

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