/**
  * Generates Stripe Payment form thanks the Stripe API.
  *
  * @param object $oMembership The Object Membership Model.
  * @return void
  */
 public function buttonStripe($oMembership)
 {
     $oStripe = new Stripe();
     $oStripe->param('item_number', $oMembership->groupId)->param('member_id', $this->session->get('member_id'))->param('amount', $oMembership->price);
     echo '<form action="', $oStripe->getUrl(), '" method="post">', $oStripe->generate(), '<script
             src="https://checkout.stripe.com/checkout.js" class="stripe-button"
             data-key="', $this->config->values['module.setting']['stripe.publishable_key'], '"
             data-name="', $this->registry->site_name, '"
             data-description="', $oMembership->name, '"
             data-amount="', str_replace('.', '', $oMembership->price), '"
             data-currency="', $this->config->values['module.setting']['currency'], '"
             data-allow-remember-me="true"
             data-bitcoin="true">
         </script>
     </form>';
     unset($oStripe);
 }