title: google checkout integration - codeigniter
body: <p>I have site built in <code>codeigniter</code> framework.</p>
  
  <p>I want to use <code>google checkout</code>.
  I have used this code to transfer fund but I need something returned so that I can know that transfer is successful and then enter values to my database.</p>
  
  <p>I am not sure how to do that.</p>
  
  <p><em>Can anyone show me step by step how to do that?</em></p>
  
  <p>My form : </p>
  
  <pre><code>&lt;form action="https://sandbox.google.com/checkout/api/checkout/v2/checkoutForm/Merchant/xxxxxxx" id="BB_BuyButtonForm" method="post" name="BB_BuyButtonForm" target="_top"&gt; 
      &lt;input name="item_name_1" type="hidden" value="Deposite"/&gt; 
      &lt;input name="item_description_1" type="hidden" value="Money Deposite"/&gt;
      &lt;input name="item_quantity_1" type="hidden" value="1"/&gt;
      &lt;input name="item_price_1" type="text" value="30.0"/&gt;
      &lt;input name="item_currency_1" type="hidden" value="USD"/&gt;
      &lt;input name="_charset_" type="hidden" value="utf-8"/&gt;&lt;br /&gt;
      &lt;input alt="" src="https://sandbox.google.com/checkout/buttons/buy.gif?merchant_id=xxxxxxxx&amp;amp;w=117&amp;amp;h=48&amp;amp;style=white&amp;amp;variant=text&amp;amp;loc=en_US" type="image"/&gt;
  &lt;/form&gt;
  </code></pre>