Magento REST API PHP test harness (admin and customer)

gistfile1.aw

<?php
/**
 * Copyright Magento 2012
 * Example of products list retrieve using Customer account via Magento
REST API. OAuth authorization is used
 */
$callbackUrl = "http://yourhost/oauth_customer.php";
$temporaryCredentialsRequestUrl =
"http://magentohost/oauth/initiate?oauth_callback=" .
urlencode($callbackUrl);
$adminAuthorizationUrl = 'http://magentohost/oauth/authorize';
$accessTokenRequestUrl = 'http://magentohost/oauth/token';
$apiUrl = 'http://magentohost/api/rest';
$consumerKey = 'yourconsumerkey';
$consumerSecret = 'yourconsumersecret';

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=' .
$requestToken['oauth_token']);
       exit;
   } else if ($_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']);
       $resourceUrl = "$apiUrl/products";
       $oauthClient->fetch($resourceUrl);
       $productsList = json_decode($oauthClient->getLastResponse());
       print_r($productsList);
   }
} catch (OAuthException $e) {
   print_r($e);
}

<?php

/**
 * Example of products list retrieve using admin account via Magento REST
API. oAuth authorization is used
 */
$callbackUrl = "http://yourhost/oauth_admin.php";
$temporaryCredentialsRequestUrl =
"http://magentohost/oauth/initiate?oauth_callback=" .
urlencode($callbackUrl);
$adminAuthorizationUrl = 'http://magentohost/admin/oAuth_authorize';
$accessTokenRequestUrl = 'http://magentohost/oauth/token';
$apiUrl = 'http://magentohost/api/rest';
$consumerKey = 'yourconsumerkey';
$consumerSecret = 'yourconsumersecret';

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=' .
$requestToken['oauth_token']);
       exit;
   } else if ($_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']);
       $resourceUrl = "$apiUrl/products";
       $oauthClient->fetch($resourceUrl);
       $productsList = json_decode($oauthClient->getLastResponse());
       print_r($productsList);
   }
} catch (OAuthException $e) {
   print_r($e);
}

I have a doubt about the class Oauth and the constants mentioned in your example (OAUTH_AUTH_TYPE_AUTHORIZATION, OAUTH_AUTH_TYPE_URI, OAUTH_SIG_METHOD_HMACSHA1, ...).
I know the same constants and class is at the magento doc.
But it don't works for me.
How do you include the Oauth class?
How do you define the constants?

where did above code is Pasted in magento folder in local server ?

how to run this please share me
i am new to magento