php实现用户登录与注销的代码示例

// BisAccount变量名， $ret用户账号信息 ，赋值bis作用域
session(‘BisAccount’, $ret, ‘bis’);
// 删除 bis作用域
session( null,‘bis’);
//取值 在bis作用域，名为BisAccount的值
session(‘BisAccount’, ‘’, ‘bis’);

class Login extends Controller{	//登录
    public function index()
    {
        if (request()->isPost()) {
            $data = input('post.');
            $ret = model('BisAccount')->get(['username'=>$data['username']]);
            if(empty($ret) || $ret->status != 1){
                $this->error('该用户不存在或者未审核通过');
            }
            $pass = $data['password'];
            $ran = $ret['code'];
            if(md5($pass."".$ran) != $ret['password']){
                $this->error('密码错误');
            }
            model('BisAccount')->updateById(['last_login_time'=>time()],$ret->id);
            //session保存用户信息 赋值bis作用域
            session('BisAccount', $ret, 'bis');
            return $this->success('登录成功',url('Index/index'));
        } else {
            $account = session('BisAccount','','bis');
            if(!empty($account) && $account->id){
                return $this->redirect(url('index/index'));
            }
            return $this->fetch();
        }
    }
		//注销
    public function logout(){
        session( null,'bis');
        $this->redirect(url('login/index'));
    }}

class Base extends  Controller{
    public $account;
    public function _initialize() {
        // 判定用户是否登录
        $isLogin = $this->isLogin();
        if(!$isLogin) {
            return $this->redirect(url('login/index'));
        }
    }

    //判定是否登录
    public function isLogin() {
        // 获取sesssion
        $user = $this->getLoginUser();
        if($user && $user->id) {
            return true;
        }
        return false;

    }

    public function getLoginUser() {
        if(!$this->account) {
            $this->account = session('BisAccount', '', 'bis');
        }
        return $this->account;
    }}

class Index extends Base{
    public function index()
    {
        return $this->fetch('');
    }
    }

//存
session(‘BisAccount’, $ret, ‘bis’);
//取
session(‘BisAccount’, ‘’, ‘bis’);