setcookie() function defines a cookie to be sent along with the rest of the HTTP headers.
A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user's computer.With PHP, you can both create and retrieve cookie values.
The name of the cookie is automatically assigned to a variable of the same name. For example, if a cookie was sent with the name "
user", a variable is automatically created called
$user, containing the cookie value.
$title= "Query Home!";
// cookie will expire when the browser close