What are the ways to set cookies in PHP?

You can set cookies in PHP using the following method:

1. The setcookie() function is used to set key-value pairs for cookies and other optional parameters. Its syntax is as follows:
2. Create a cookie with specified parameters such as name, value, expiration time, path, domain, security, and HTTP only flag.
3. Parameters Description:
4. The name of the cookie.
5. Value: the value of the cookie.
6. expire: Optional parameter, indicating the expiration time of the cookie, presented in UNIX timestamp format.
7. Path: an optional parameter indicating the valid path for the cookie, with the default being the current path.
8. Domain: Optional parameter, indicating the valid domain of the cookie, defaulting to empty.
9. Optional parameter, if set to true, it indicates that the cookie can only be sent through an HTTPS connection.
10. HttpOnly is an optional parameter that, when set to true, indicates that a cookie can only be accessed through the HTTP protocol and not through JavaScript.
11. Original:

    我和我的家人去了海滩度假。

    Paraphrased:

    My family and I went on a beach vacation.

12. Create a cookie named “username” with the value “john_doe” that expires in 1 hour and is accessible from the root directory.
13. The $_COOKIE superglobal variable is used in PHP to store all cookies sent by the client when making a request to the server. It allows for directly modifying the variable in a PHP script to set the value of a cookie.
14. 示例：Please clean up your room before you leave.
15. The username in the cookie is set to “john_doe”.
16. You can use the header() function to set a cookie by sending the Set-Cookie header.
17. I am currently unable to attend the meeting.
18. Create a cookie with the username “john_doe” that will expire in 1 hour.

Please note that cookies are sent to the client through the HTTP response header, so it is necessary to set the cookie before sending any output.