I have a singlepage (php) with any items (loaded in Magento), the idea is:

  1. The user access to singlepage.magentodomain.com.
  2. User press click on "buy now".
  3. User sees the magento checkout page, with item selected.

The HTML can contain the ID product and send it to Magento from HTTP verbs (POST, GET, etc.) or something else, but I not found information about this.

My Magento version is:

Update (2016-03-9)

I found the next questions:

Based on this and @St0iK's answer, I developed the following:


$_product = Mage::getModel('catalog/product')->load(11);
$formKey = Mage::getSingleton('core/session')->getFormKey();

The next code get the "submit url":

Option 1

$submitUrl = Mage::app()

Option 2

$submitUrl = Mage::helper('checkout/cart')->getAddUrl($_product);


<form action="<?php echo $submitUrl; ?>" method="post">
    <input type="hidden" name="related_product" id="related-products-field" value=""/>
    <input type="hidden" name="form_key" value="<?php echo $formKey; ?>">
    <input type="hidden" name="product" value="11">
    <input type="hidden" name="qty" value="1">
    <button type="submit">Buy now</button>

Request information (after submit)

Request information

  • Request URL: http://domain.dev/checkout/cart/add/uenc/aHR0cDovL21kci5kZXYvc2luZ2xlLnBocA,,/product/11/form_key/Md2JmzgTZLzWiX9l/
  • Request Method: POST
  • Status Code: 302 Found
  • Remote Address:
  • Response Headers
  • Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
  • Connection: Keep-Alive
  • Content-Length: 0
  • Content-Type: text/html; charset=UTF-8
  • Date: Wed, 09 Mar 2016 16:21:29 GMT
  • Expires: Thu, 19 Nov 1981 08:52:00 GMT
  • Keep-Alive: timeout=5, max=100
  • Location: http://domain.dev/checkout/cart/
  • Pragma: no-cache
  • Server: Apache/2.4.12 (Ubuntu)
  • Set-Cookie: frontend=5umonnllqprpt57a6vd6lapvb2; expires=Wed, 09-Mar-2016 17:21:30 GMT; Max-Age=3600; path=/; domain=domain.dev; HttpOnly
  • X-Frame-Options: SAMEORIGIN
  • Request Headers
  • Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,/;q=0.8
  • Accept-Encoding: gzip, deflate
  • Accept-Language: es-ES,es;q=0.8,en;q=0.6
  • Cache-Control: no-cache
  • Connection: keep-alive
  • Content-Length: 59
  • Content-Type: application/x-www-form-urlencoded
  • Cookie: __atuvc=17%7C10; PHPSESSID=cn17rnrbf1h2va76edb1iqmoq5
  • Host: domain.dev
  • Origin: http://domain.dev
  • Pragma: no-cache
  • Referer: http://domain.dev/single.php
  • Upgrade-Insecure-Requests: 1
  • User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.75 Safari/537.36
  • Form Data
  • related_product:
  • form_key: Md2JmzgTZLzWiX9l
  • product: 11
  • qty: 1

1 Answer 1


You can try something like this to build the 'Buy now' button for your product

$formKey = Mage::getSingleton('core/session')->getFormKey();
<form action="/checkout/cart/add/product/<?php echo $productid; ?>" method="post">
<input type="hidden" name="form_key" value="<?php echo $formKey; ?>" />
    <input type="text" name="qty"> QTY
    <input type="submit" value="Add to basket" />

You might need to load Mage.php first in your script.

require_once('app/Mage.php'); //Path to Magento

// Now you can run ANY Magento code you want
// You can find some information here. Get the form key and build the form


  • I have the code working in my file single.php and it print the formkey and submit URL, but when I submit the form, the Magento page shows me "SHOPPING CART IS EMPTY".
    – Chofoteddy
    Mar 9, 2016 at 16:23

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