thinkphp通行证服务，验证登录，注销登录

<?php
/**
 * 通行证服务
 */
class PassportService extends Service {

    /**
     * 验证用户或者管理员是否已登录
     * @return boolean
     */
    public function isLogged($admin=false){
        //$_cookie_user=cookie('LOGGED_USER');
        $_session_username    =    $_SESSION[C('COOKIE_PREFIX').'username'];
        $_session_uid       =   $_SESSION[C('COOKIE_PREFIX').'uid'];
        $_session_isadmin   =   intval($_SESSION[C('COOKIE_PREFIX').'isadmin']);
        // 验证本地系统登录
        if ($_session_user || $_session_uid){
            if(!$admin){
                return true;
            }
            elseif($admin&&$_session_isadmin==1){
                return true;
            }
            else{
                return false;
            }
        }else{
            return false;
        }
    }
//验证登录提交参数
    public function doLogin($username,$password){
        if(empty($username) || empty($password)){
            return false;
        }
        //$username=addcslashes($username);
        
        
        $password=md5($password);
        $map=array();
        $map['username']=$username;
        $map['password']=$password;
        $uid=M("user")->where($map)->getField('uid');
        
       // $password=md5($password);
        //$uid=M("user")->where("username='{$username}' and password='{$password}'")->getField('uid');
        if(!$uid){
            return false;
        }
        else{
            return $this->online($uid);
        }
    }
//写入cookie和session
    public function online($uid){
        $uid=intval($uid);
        if($uid<=0){
            return false;
        }
        else{
            $user=M("user")->where("uid={$uid}")->field('uid,username,isadmin')->find();
            if(!$user){
                return false;
            }else{
                header("P3P: CP=.");
                cookie('LOGGED_USER',$user['username']);
                $_SESSION[C('COOKIE_PREFIX').'username'] = $user['username'];
                $_SESSION[C('COOKIE_PREFIX').'uid']         = $user['uid'];
                $_SESSION[C('COOKIE_PREFIX').'isadmin']         = $user['isadmin'];
                $this->recordLogin($user['uid']);
                return true;
            }
        }
    }
    
    /**
     * 注销本地登录
     * @return void
     */
    public function logoutLocal() {
        //注销session
        unset($_SESSION[C('COOKIE_PREFIX').'username']);
        unset($_SESSION[C('COOKIE_PREFIX').'uid']);
        unset($_SESSION[C('COOKIE_PREFIX').'isadmin']);
        //注销cookie
        cookie('LOGGED_USER',NULL);

    }
    
        /**
     * 登录记录
     * 
     * @param int $uid 用户ID
     */
    public function recordLogin($uid) {
        $login['uid']        = $uid;
        $login['ip']        = get_client_ip();
        $login['place']        = convert_ip($login['ip']);
        $login['ctime']        = time();
        M('login_record')->add($login);
    }


    /* 后台管理相关方法 */
    
    // 运行服务，系统服务自动运行
    public function run(){
        return;
    }

    //启动服务，未编码
    public function _start(){
        return true;
    }

    //停止服务，未编码
    public function _stop(){
        return true;
    }

    //卸载服务，未编码
    public function _install(){
        return true;
    }

    //卸载服务，未编码
    public function _uninstall(){
        return true;
    }
}
?>