title: Send extra_data to simplecart.js with sendform to email address
body: <p>I am to trying to send additional details with the sendform method in simplecart. I am able to send the item details, but I am unable to send the extra_data attibute. </p>
  
  <p>Script at the bottom of the checkout page</p>
  
  <pre><code>&lt;script&gt;
  simpleCart({
  checkout: {
  type: "SendForm" ,
  url: "http://www.####.com/process/sendform.php"
   },
  
   extra_data: {
        company: "Company A", 
        email: "email@companya.com"
  
     },
  
      });
  &lt;/script&gt;
  </code></pre>
  
  <p>Php Script </p>
  
  <pre><code>&lt;?php
   $to = '####@gmail.com';
   $subject = 'Simple Cart Order';
   $content = $_POST;
   $body = '';
   for($i=1; $i &lt; $content['itemCount'] + 1; $i++) {
   $name = 'item_name_'.$i;
   $quantity =  'item_quantity_'.$i;
   $price = 'item_price_'.$i;
   $company = 'extra_data_company_'.$i;
   $body .= 'item #'.$i.': ';
   $body .= $content[$name].' '.$content[$quantity].' '.$content[$price]  $content[$company];
   $body .= '&lt;br&gt;';
  }
   $headers = 'From: webmaster@example.com' . "\r\n" .
   'Reply-To: webmaster@example.com' . "\r\n" .
   'X-Mailer: PHP/' . phpversion();
    mail($to, $subject, $body, $headers);
    Header('Location: thankyou.php');
  ?&gt;
  </code></pre>