To know what is a cookie and about the optional parameters for the cookie see click the link below.
http://findnerd.com/list/view/What-is-a-cookie/13459/
Here we will see how to create a cookie and modify the cookie and how the cookie expires.For creating a cookie we us a php function setcookie().
The syntax for the cookie function is below in which all the parameters are optional other than "name".
setcookie(name, value, expire, path, domain, secure, httponly);
1-Creating a cookie
<?php
$credentialone = "userinfo";
$credentialtwo = "vijaykant";
setcookie($credentialone, $ credentialtwo, time() + (86400 * 30), "/");
?>
<html>
<body>
<?php
if(!isset($_COOKIE[$credentialone])) {
echo "Cookie name is not set..!";
} else {
echo "Cookie name is set as:".$_COOKIE[$credentialone];
echo "and the value of cookie name is: " . $_COOKIE[$credentialtwo];
}
?>
</body>
</html>
Note: we can also modify the cookie name using setcookie().
2- Deleting the cookie
For deleting the cookie we again use the setcookie() function
In set cookie function we set the past time to expire the cookie;
For Example:
<?php
setcookie($credentialone, $credentialtwo, time() - 3600);
?>
<html>
<body>
<?php
echo "Cookie with name. $_COOKIE[$credentialtwo]. is expired.";
?>
</body>
</html>
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