Using ThinkPHP6 to implement cookie control

With the continuous popularity of Web applications, the use of Cookies has become more and more important. Cookie is a technology that stores data on the client side. It can save some information, such as the user's login status, shopping cart information, etc.

In this article, we will introduce how to use ThinkPHP6 to implement Cookie control to manage user login status.

1. What is Cookie?

HTTP protocol is a stateless protocol, and each request and response do not interfere with each other. In order to allow the server to perform state management, Cookie technology came into being.

Cookie is a small file stored on the client side and saved on the user's browser. We can set the relevant information passed by the server to the browser so that the browser can save it locally. This information can be the user's ID, user name, shopping cart items, etc.

The basic structure of Cookie is as follows:

name=value; expires=date; path=path_value; domain=domain_value; secure

Among them, name represents the name of the Cookie, value represents the value of the Cookie, expires represents the expiration time of the Cookie, path represents the effective path of the Cookie, and domain represents the Cookie. A valid domain name, secure represents the security flag of the cookie.

2. Setting Cookies in ThinkPHP6

In ThinkPHP6, we can manage cookie information through the Cookie class. The following is a basic example of using the Cookie class:

use thinkacadeCookie;

// 设置cookie
Cookie::set('name', 'value', 3600);

// 获取cookie
$value = Cookie::get('name');

// 删除cookie
Cookie::delete('name');

In the above example, we can use the set( ) method to set the value and expiration time of the Cookie, use get( ) method to get the value of the Cookie, and use the delete( ) method to delete the Cookie. Among them, the expiration time is in seconds.

If we need to set the path and domain name of the Cookie, we can use the option( ) method to pass the relevant parameters, as shown below:

use thinkacadeCookie;

// 设置cookie路径和域名
Cookie::set('name', 'value', ['expire' => 3600, 'path' => '/', 'domain' => 'yourdomain.com']);

3. Use Cookie to implement users Login status management

In web applications, cookies are often used to manage user login status. The following is a basic example of using ThinkPHP6 to implement user login status management:

use thinkacadeCookie;
use appmodelUser;

// 用户登录
public function login()
{
    // 验证用户

    // 登录成功，设置Cookie
    $user = User::where('username', input('post.username'))->find();
    Cookie::set('login_id', $user->id, 3600);

    // 跳转至首页
    return redirect('/');
}

// 首页
public function index()
{
    // 验证登录

    // 获取登录用户信息
    $user = User::where('id', Cookie::get('login_id'))->find();

    // 输出用户信息
    return 'Welcome back, ' . $user->username . '!';
}

// 用户退出
public function logout()
{
    // 删除Cookie
    Cookie::delete('login_id');

    // 跳转至登录页面
    return redirect('/login');
}

In the above example, we use cookies to save logged in user information. When the login is successful, we set the cookie of login_id and save the user's ID in the cookie. When visiting the homepage, we read the login_id saved in the cookie and use this ID to obtain user information.

If the user logs out, we use the delete( ) method to delete the login_id saved in the cookie.

4. Summary

This article introduces how to use ThinkPHP6 to implement Cookie control to manage user login status. We use Cookie categories to set, obtain and delete Cookie information, and use Cookies to save logged in user information.

Using Cookie technology can easily save some information and manage status between various pages. However, we also need to pay attention to the security of cookies to avoid security holes.

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