php QQ登录 session['state'] 一直找不到 求解,该如何处理

php QQ登录 session['state'] 一直找不到 求解
易联主机的虚拟空间（不知道跟这个有没有关系）

使用QQsdk php 做QQ登录
按照步骤设置config和session文件
结束只有一个





//session.php 代码


/**
 * PHP SDK for QQ登录 OpenAPI
 *
 * @version 1.2
 * @author connect@qq.com
 * @copyright © 2011, Tencent Corporation. All rights reserved.
 */

/**
 * @brief 设置session配置 
 */

/**
 * CREATE TABLE `tbl_session` (
 * `session_id` varchar(255) binary NOT NULL default '',
 * `session_expires` int(10) unsigned NOT NULL default '0',
 * `session_data` text,
 * PRIMARY KEY (`session_id`)
 * ) ENGINE=MyISAM;
 */

class Session 
{
  //mysql的主机地址
  const db_host = "localhost"; //需要第三方指定ip地址 

  //数据库用户名
  const db_user = "ibrat"; //需要第三方指定自己的用户名

  //数据库密码
  const db_pwd = "ibrat"; //需要第三方指定自己的库据库密码

  //数据库
  const db_name = "ibrat"; //需要第三方指定数据库

  //数据库表
  const db_table = "ghb_session"; //需要第三方指定数据表

  //mysql-handle
  private $db_handle;

  //session-lifetime
  private $lifeTime;

  function open($savePath, $sessName) 
  {
  // get session-lifetime
  $this->lifeTime = get_cfg_var("session.gc_maxlifetime");

  // open database-connection
  $db_handle = @mysql_connect(self::db_host, self::db_user, self::db_pwd);

  $dbSel = @mysql_select_db(self::db_name, $db_handle);

  // return success
  if(!$db_handle || !$dbSel)
  return false;

  $this->db_handle = $db_handle;
  return true;
  }

  function close() 
  {
  $this->gc(ini_get('session.gc_maxlifetime'));
  // close database-connection
  return @mysql_close($this->db_handle);
  }

  function read($sessID) 
  {
  // fetch session-data
  $res = @mysql_query("SELECT session_data AS d FROM ".self::db_table." 
  WHERE session_id = '$sessID'
  AND session_expires > ".time(), $this->db_handle);

  // return data or an empty string at failure
  if($row = @mysql_fetch_assoc($res))
  return $row['d'];

  return "";
  }

  function write($sessID, $sessData) 
  {
  // new session-expire-time
  $newExp = time() + $this->lifeTime;

  // is a session with this id in the database?
  $res = @mysql_query("SELECT * FROM ".self::db_table." 
  WHERE session_id = '$sessID'", $this->db_handle);

  // if yes,
  if(@mysql_num_rows($res)) 
  {
  // ...update session-data
  @mysql_query("UPDATE ".self::db_table." 
  SET session_expires = '$newExp',
  session_data = '$sessData'
  WHERE session_id = '$sessID'", $this->db_handle);

  // if something happened, return true
  if(@mysql_affected_rows($this->db_handle))
  return true;
  }
  else // if no session-data was found,