ThinkPHP - 登录流程

/**
 * 验证登录
 * @return [type] [description]
 */
public function dologin(){
    if ( !IS_POST ) halt(‘非常规提交！‘);

    if ( I(‘code‘, ‘‘, ‘md5‘) != $_SESSION[‘verify‘] ) $this->error(‘验证码错误！‘);

    $username = I(‘username‘);
    $password = I(‘password‘, ‘‘, ‘md5‘);
    $user = M(‘User‘)->where(array(‘username‘=>$username, ‘password‘=>$password))->find();
    if ( !$user ) $this->error(‘账号或密码错误！‘);

    $whe = array(
        ‘id‘        => $user[‘id‘],
        ‘logintime‘ => time(),
        ‘loginip‘   => get_real_ip(),
    );
    $res = M(‘User‘)->save($whe);
    if ( !$res ) $this->error(‘更新数据失败，请重新登录！‘);

    $_SESSION[‘id‘]         = $user[‘id‘];
    $_SESSION[‘loginip‘]    = $user[‘loginip‘];
    $_SESSION[‘username‘]   = $user[‘username‘];
    $_SESSION[‘logintime‘]  = $user[‘logintime‘];

    $this->redirect(‘/Admin/Index/index‘);
}