Redirect with POST data

Question

I am working on a shopping cart with several payment options using different APIs.

The flow I want is that the user chooses which payment option to use and the accor

Answer 1

You can't send a traditional Location: header to the HTTP client to do a redirect and include POST data. What you could do instead is:

• use an AJAX request to fetch the correct target URL
• update the form action with that URL via JavaScript (in the AJAX callback function)
• submit the form

Answer 2

Try this

        $context = stream_context_create(array(
        'http' => array(
          'method'  => 'POST',
          'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
          'content' => http_build_query($_POST)
        ),
      )); 

    echo file_get_contents($url, false, $context);

Answer 3

Easiest thing to do is have a form submit handler in JavaScript code that will make an AJAX POST request to save the customer-related info.

• The payment form's action should point to the payment gateway
• Attach a JavaScript on submit event to the payment form
• In the submit handler, gather all of the customer info (name, address, etc) and make an AJAX POST to your server.
• Make sure that the submit handler returns false so that the POST does not submit to the payment gateway just yet
• Once the AJAX POST succeeds submit the payment form using JavaScript.

This also saves you because you can control what parameters to send to your server (the customer's credit card / CVV numbers should not be sent to your server unless you are certified to handle them).

Answer 4

If you have the PECL http extension installed (it'll show up in phpinfo() as pecl_http) you can create an HTTP POST request and spit out the results after the following pattern:

// your DB code above here
$pay_request = new HttpRequest($remote_url, HTTP_METH_POST);
$pay_request->addPostFields($_POST);
$pay_request->send()->send();

Last line's not a typo - the request returns a response, and then the response gets dumped in the output buffer.