a oauth client based on codeigniter PHP

strategy_oauth.php

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * strategy_sauth.php
 * 
 * A Oauth client
 *
 * @author    Chen Ting
 * @copyright free to use
 * @link    
 * @since   Version 0.0.1
 * @filesource
 */

class Strategy_oauth
{
  //defaults 全局变量
  var $app_id = "YOU APPID" ;
  var $app_secret = "YOU APP SECRET" ;
  var $redirect_url = "YOU REDIRECT URL";
  var $grant_type = "authorization_code";
  var $post_token_url = "ACCESS TOKEN REQUEST  URL";
  var $post_user_url = "ACCESS USER DATA REQUEST";

  //post request
  private function post_my_curl($curlPost,$post_url)
  {
    $ch = curl_init();//初始化curl
    curl_setopt($ch,CURLOPT_URL,$post_url);//抓取指定网页
    curl_setopt($ch, CURLOPT_HEADER, 0);//设置header
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//要求结果为字符串且输出到屏幕上
    curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
    curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
    $data = curl_exec($ch);//运行curl
    curl_close($ch);

    return $data;
  }

  //使用code交换token
  public function get_oauth_token($code)
  {
    //local变量
    $curlPost = 'client_id='.urlencode($this->app_id).
                '&client_secret='.urlencode($this->app_secret).
                '&redirect_uri='.urlencode($this->redirect_url).
                '&code='.urlencode($code).
                '&grant_type='.urlencode($this->grant_type).
                '';
    //获取令牌
    $token_json = $this->post_my_curl($curlPost,$this->post_token_url);
    $token_arr = json_decode($token_json,TRUE);

    //检查是否有token返回值，没有弹出，有则使用token继续取用户数据
    if (!$token_arr['access_token']) {
      return FALSE; //登陆失败
    } else {
      $access_token = $token_arr['access_token'];
      $curlPost = 'access_code='.urlencode($access_token).'';
      $user_detail_json = $this->post_my_curl($curlPost,$this->post_user_url);
      $user_detail_arr = json_decode($user_detail_json,TRUE);
      if ($user_detail_arr['error'] == 1) {
        return FALSE; //登陆失败
      } else {
        return $user_detail_arr;
      }
    }
  }
}