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How to check cookies in php

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Release： 2023-02-23 18:54:02
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How to check cookies in php

What are Cookies?

Cookies are often used to identify users. Cookies are small files that a server leaves on a user's computer. Whenever the same computer requests a page through the browser, it also sends the cookie. With PHP, you can create and retrieve cookie values.

How to create a cookie?

The setcookie() function is used to set cookies. (Recommended learning: PHP Programming from Beginner to Master)

Note: The setcookie() function must be located before the tag.

Syntax

setcookie(name, value, expire, path, domain);
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Example

In the following example, we will create a cookie named "user" and assign it the value "Alex Porter". We also stipulate that this cookie expires after one hour: 

<?php 
setcookie("user", "Alex Porter", time()+3600);
?>
<html>
<body>
</body>
</html>
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Note: When sending a cookie, the cookie value will be automatically URL-encoded and automatically decoded when retrieved (to prevent URL encoding, please use setrawcookie() instead).

How to check the value of Cookie?

PHP’s $_COOKIE variable is used to retrieve the value of the cookie.

In the following example, we retrieve the value of the cookie named "user" and display it on the page: 

<?php
// Print a cookie
echo $_COOKIE["user"];
// A way to view all cookies
print_r($_COOKIE);
?>
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