adminauth.php

<?php
/**
 * Example of retrieving the products list using Admin account via Magento REST API. OAuth authorization is used
 * Preconditions:
 * 1. Install php oauth extension
 * 2. If you were authorized as a Customer before this step, clear browser cookies for 'yourhost'
 * 3. Create at least one product in Magento
 * 4. Configure resource permissions for Admin REST user for retrieving all product data for Admin
 * 5. Create a Consumer
 */

        $callbackUrl = "call back url";
        $temporaryCredentialsRequestUrl = "http://domain host/oauth/initiate?oauth_callback=" . urlencode($callbackUrl);
        $adminAuthorizationUrl = 'http://domain host/admin/oauth_authorize';
        $accessTokenRequestUrl = 'http://domain host/oauth/token';
        $apiUrl = 'http://domain host/api/rest/orders';

        $consumerKey = 'Your-key';
        $consumerSecret = 'Your-key';

        session_start();
        if (!isset($_GET['oauth_token']) && isset($_SESSION['state']) && $_SESSION['state'] == 1) {
            $_SESSION['state'] = 0;
        }
        try {
            $authType = ($_SESSION['state'] == 2) ? OAUTH_AUTH_TYPE_AUTHORIZATION : OAUTH_AUTH_TYPE_URI;
            $oauthClient = new OAuth($consumerKey, $consumerSecret, OAUTH_SIG_METHOD_HMACSHA1, $authType);
            $oauthClient->enableDebug();


            if (!isset($_GET['oauth_token']) && !$_SESSION['state']) {

                $requestToken = $oauthClient->getRequestToken($temporaryCredentialsRequestUrl);
                $_SESSION['secret'] = $requestToken['oauth_token_secret'];
                $_SESSION['state'] = 1;

                header('Location: ' . $adminAuthorizationUrl . '?oauth_token=' . $requestToken['oauth_token']);

            } else if ($_SESSION['state'] == 1) {
                $oauthClient->setToken($_GET['oauth_token'], $_SESSION['secret']);
                $accessToken = $oauthClient->getAccessToken($accessTokenRequestUrl);
                $_SESSION['state'] = 2;
                $_SESSION['token'] = $accessToken['oauth_token'];
                $_SESSION['secret'] = $accessToken['oauth_token_secret'];
                header('Location: ' . $callbackUrl);
                exit;
            } else {
                $oauthClient->setToken($_SESSION['token'], $_SESSION['secret']);
                $oauthClient->fetch($apiUrl, array(), 'GET', array('Content-Type' => 'application/json'));
                $productsList = json_decode($oauthClient->getLastResponse());
                print_r(json_encode($productsList));
            }
        } catch (OAuthException $e) {
            print_r($e->getMessage());
            echo "&lt;br/&gt;";
            print_r($e->lastResponse);
        }