GitHub issue #18

From: https://github.com/drastik/civicrm_stripe/issues/18
Remove all non-numeric characters from amount.
by DaveBagler

com.drastikbydesign.stripe/CRM/Core/Payment/Stripe.php

@@ -202,10 +202,9 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
     Stripe::setApiKey($this->_paymentProcessor['user_name']);
 
     // Stripe amount required in cents.
-    $amount = $params['amount'] * 100;
+    $amount = (int)preg_replace('/[^\d]/', '', strval($params['amount']));
     // It would require 3 digits after the decimal for one to make it this far.
     // CiviCRM prevents this, but let's be redundant.
-    $amount = number_format($amount, 0, '', '');
 
     // Get Cardholder's full name.
     /*