Is php cookie an array?

Cookies in PHP can be seen as a small data file stored in the user's computer. It can help the website remember some information about the user, such as the user's login status, shopping cart product list, etc. In PHP, cookies are usually stored in the client's browser as strings, not arrays.

However, although the cookie itself is not an array, we can use an array to store multiple cookies. The array here is usually an associative array, where each key represents the name of a cookie and the corresponding value represents the value of the cookie. In PHP, we can use the setcookie function to set a cookie and access the cookie value on the current page through the $_COOKIE superglobal array.

For example, suppose we want to set a cookie named "username" with a value of "johndoe", then we can use the following code:

setcookie("username", "johndoe", time()+3600);  //设置cookie有效期为1小时

In this code, the setcookie function Three parameters are accepted. The first parameter is the name of the cookie, "username", the second parameter is the value of the cookie, "johndoe", and the third parameter is the validity period of the cookie. Here we set it to the current time plus 3600 seconds, which is 1 hour. expires later.

Then, we can use the $_COOKIE superglobal array to read the value of the cookie. For example, the following code can output the value of the "username" cookie on the current page:

echo $_COOKIE["username"];

Note that if you try to read a cookie that does not exist or a cookie that has expired, the $_COOKIE array will return an empty value. value(null).

In short, PHP cookies are not arrays, but we can use an array to store multiple cookies. In PHP, using the setcookie function to set a cookie and using the $_COOKIE superlocal array to read the cookie value are fairly simple operations.

The above is the detailed content of Is php cookie an array?. For more information, please follow other related articles on the PHP Chinese website!