PHP Cookies
A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values.
PHP setcookie() function
PHP setcookie() function is used to set cookie with HTTP response. Once cookie is set, you can access it by $_COOKIE superglobal variable.
Syntax
bool setcookie ( string $name [, string $value [, int $expire = 0 [, string $path
[, string $domain [, bool $secure = false [, bool $httponly = false ]]]]]] )
See this example:
setcookie("CookieName", "CookieValue");/* defining name and value only*/
setcookie("CookieName", "CookieValue", time()+1*60*60);//using expiry in 1 hour(1*60*60 seconds or 3600 seconds)
setcookie("CookieName", "CookieValue", time()+1*60*60, "/mypath/", "mydomain.com", 1);
PHP $_COOKIE
PHP $_COOKIE superglobal variable is used to get cookie.
Example
$value=$_COOKIE["CookieName"];//returns cookie value
PHP Cookie Example
File: cookie1.php
<?php
setcookie("user", "Sonoo");
?>
<html>
<body>
<?php
if(!isset($_COOKIE["user"])) {
echo "Sorry, cookie is not found!";
} else {
echo "Cookie Value: " . $_COOKIE["user"];
}
?>
</body>
</html>
Output:
Sorry, cookie is not found!
Firstly cookie is not set. But, if you refresh the page, you will see cookie is set now.
Output:
Cookie Value: Sonoo
PHP Delete Cookie
If you set the expiration date in past, cookie will be deleted.
File: cookie1.php
<?php
setcookie ("CookieName", "", time() - 3600);// set the expiration date to one hour ago
?>
