gistfile1.php

<?php
// OpenSocial RESTful APIサンプル
// ライブラリとして　http://oauth.googlecode.com/svn/code/php/　を利用しています。
include_once('oauth/OAuth.php');

define('CONSUMER_KEY', '#CONSUMER_KEY#');
define('CONSUMER_SECRET', '#CONSUMER_SECRET#');

define('BASE_URL', 'http://sns.example.com');

define('REQUEST_TOKEN_URL', BASE_URL.'/oauth/request_token');
define('AUTHORIZE_URL', BASE_URL.'/oauth/authorize');
define('ACCESS_TOKEN_URL', BASE_URL.'/oauth/access_token');

header('Content-Type: text/html; charset=utf8');

$consumer = new OAuthConsumer(CONSUMER_KEY, CONSUMER_SECRET);

if ($_GET['mode'] !== 'g'):

$request = OAuthRequest::from_consumer_and_token($consumer, null, 'POST', REQUEST_TOKEN_URL);
$request->set_parameter('oauth_callback', 'http://www.vm3/oauth.php?mode=g');
$request->sign_request(new OAuthSignatureMethod_HMAC_SHA1(), $consumer, null);
$res = do_post($request->get_normalized_http_url(), $request->to_postdata());
$token = token_array_by_string($res);

header('Location: '.AUTHORIZE_URL.'?oauth_token='.$token['oauth_token']);
exit;

else:

$request = OAuthRequest::from_consumer_and_token($consumer, $_GET['oauth_token'], 'POST', ACCESS_TOKEN_URL, $_GET);
$token = new OAuthToken($_GET['oauth_token'], null);
$request->sign_request(new OAuthSignatureMethod_HMAC_SHA1(), $consumer, $token);

$res = do_post($request->get_normalized_http_url(), $request->to_postdata());
$tokenParam = token_array_by_string($res);
$token = new OAuthToken($tokenParam['oauth_token'], $tokenParam['oauth_token_secret']);

$request = OAuthRequest::from_consumer_and_token(
  $consumer,
  $tokenParam['oauth_token'],
  'GET',
  'http://openpne3.trunk.vm3/api.php/social/rest/people/@me/@self',
  $tokenParam
);
$request->set_parameter('fields', 'birthday,age,languagesSpoken');
$request->sign_request(new OAuthSignatureMethod_HMAC_SHA1(), $consumer, $token);

$res = do_get($request->get_normalized_http_url(), $request->to_postdata());

var_dump($res);
exit;
$object = json_decode($res);
$entry = $object->entry;

echo sprintf('%sの情報をとってきました。誕生日は%sのようです',$entry->displayName, $entry->birthday);
endif;

function do_post($uri, $data = '')
{
  $h = curl_init();
  curl_setopt($h, CURLOPT_URL, $uri);
  curl_setopt($h, CURLOPT_POST, true);
  curl_setopt($h, CURLOPT_POSTFIELDS, $data);
  curl_setopt($h, CURLOPT_RETURNTRANSFER, true);

  $result = curl_exec($h);

  curl_close($h);

  return $result;
}

function do_get($uri, $data = '')
{
  $h = curl_init();
  curl_setopt($h, CURLOPT_URL, $uri.'?'.$data);
  curl_setopt($h, CURLOPT_POST, false);
  curl_setopt($h, CURLOPT_RETURNTRANSFER, true);

  $result = curl_exec($h);

  curl_close($h);

  return $result;
}

function token_array_by_string($string)
{
  $result = array();
  $params = explode('&', $string);

  foreach ($params as $param)
  {
    $pieces = explode('=', $param);
    $result[$pieces[0]] = $pieces[1];
  }

  return $result;
}