Are there any security risks associated with manipulating cookies across different domains in PHP?

When manipulating cookies across different domains in PHP, there are security risks involved. This is because cookies are tied to a specific domain and can be accessed by any page on that domain. To mitigate this risk, you can set the cookie's domain parameter to restrict its access to a specific domain.

setcookie('cookie_name', 'cookie_value', time() + 3600, '/', 'example.com', false, true);