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);
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>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); ?>
The above is the detailed content of How to check cookies in php. For more information, please follow other related articles on the PHP Chinese website!
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