PHP code example to implement user login and logout

This article brings you code examples about php to implement user login and logout. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. .

Although I have written about the login function before, I have not looked at the logout function seriously. Hereby record

When you click to log in, the user account information is stored in the defined scope (session) in the form of variables. Session represents a session. As long as you do not close the current browser, its value will exist. The default is about 20 minutes.

// 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’);

Login

// If it is a post request, that is, the data coming from the login page, then determine the user name and Is the password correct?
The account password is spliced ​​with randomly generated numbers and encrypted using MD5

// If it is not a post, determine whether there is login information in the session
Yes Jump to the page after login
No Jump to the login page

class Login extends Controller{	//PHP code example to implement user login and logout
    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('PHP code example to implement user login and logout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'));
    }}

The page after login

##Base

Determine whether there is a BisAccount in the session

Yes, indicate the login status
No, redirect to the login page

class Base extends  Controller{
    public $account;
    public function _initialize() {
        // 判定用户是否PHP code example to implement user login and logout
        $isLogin = $this->isLogin();
        if(!$isLogin) {
            return $this->redirect(url('login/index'));
        }
    }

    //判定是否PHP code example to implement user login and logout
    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;
    }}

Index

Home Page Inherited from Base. If the account is logged out and you access index/index again, the _initialize initialization method in Base will be used to determine whether there is a BisAccount in the bis scope and jump to the login page without accessing the page after login.

After logging in, accessing index/index and login/index returns the same page.

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

tip: If the saved Session name is A, you must also use A when retrieving the Session

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

are all BisAccount

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