How can the "expires" parameter be effectively utilized when deleting cookies in PHP?

When deleting cookies in PHP, the "expires" parameter can be effectively utilized by setting it to a time in the past. This will instruct the browser to remove the cookie immediately. By setting the "expires" parameter to a time before the current time, the cookie will be invalidated and deleted.

// Set the cookie to expire in the past to delete it
setcookie("cookie_name", "", time() - 3600, "/");