PHP Cookie

PHP cookie is a small piece of information which is stored at client browser. It is used to recognize the user.

Cookie is created at server side and saved to client browser. Each time when client sends request to the server, cookie is embedded with request. Such way, cookie can be received at the server side.

In short, cookie can be created, sent and received at server end.

Note: PHP Cookie must be used before <html> tag.

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 ]]]]]] )

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

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 "<br/>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
?>

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