Using Cookie Technology in ThinkPHP6

As a common state management technology, Cookie has been widely used in Web application development. It can save simple data such as username, shopping cart data, etc. to pass information between different pages. In ThinkPHP6, using Cookie technology is also very simple.

1. Set Cookie

In ThinkPHP6, we can use the Cookie class to set Cookie. This class encapsulates some methods that can easily set, obtain and delete cookies.

use thinkacadeCookie;

// 设置一个名为username的Cookie，值为admin，有效期为1天（以秒为单位）
Cookie::set('username', 'admin', 86400);

In the above code, the set() method has three parameters, which are the name, value and validity period of the cookie. Among them, the validity period is an optional parameter. If not specified, it will expire when the browser is closed by default.

2. Read Cookie

We can use the get() method to read the value of Cookie:

use thinkacadeCookie;

// 读取名为username的Cookie的值
$username = Cookie::get('username');

If Cookie If it does not exist, null will be returned.

3. Delete Cookie

Sometimes, we need to delete a Cookie, we can use the delete() method:

use thinkacadeCookie;

// 删除名为username的Cookie
Cookie::delete('username');

4. Cookie options

When setting Cookie, we can set Cookie options through the fourth parameter. For example:

use thinkacadeCookie;

// 设置名为test的Cookie，值为123，有效期为1小时，只能通过HTTPS协议传输
Cookie::set('test', '123', 3600, [
    'httponly' => true,
    'secure'   => true,
]);

In the above code, we set two options: httponly and secure. The httponly option can prevent cookies from being accessed in JavaScript, thereby increasing security; the secure option indicates that the cookie can only be transmitted under the HTTPS protocol, which is also a security measure.

5. Using Cookies in View

You can also use the Cookie class to read Cookies in View. For example:

// 获取名为username的Cookie
$username =     hinkacadeCookie::get('username');

// 在View中输出Cookie的值
echo '欢迎您，' . $username;

In the above code, we first use the get() method to obtain the Cookie value named username, and then output it in the View.

6. Summary

The above is how to use Cookie technology in ThinkPHP6. Cookie is a very simple and easy-to-use state management technology, but you need to pay attention to security when using it. In order to prevent security issues such as XSS, we should use options to increase cookie security whenever possible.

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