Error while using REST api in magento

Question

I have set up magento locally in my system using XAMPP

I have created a file in root directory named dm.php with the contents

Answer 1

For installing Oauth : http://www.magentocommerce.com/api/rest/authentication/oauth_authentication.html

Installing PHP Extension for Oauth : 1. Download php_oauth.dll file and add it under C:\xampp\php\ext\ 2. add [PHP_OAUTH] extension=php_oauth.dll in php.ini