What are the challenges of exchanging cookies between a local web server and an internet web server in PHP?

When exchanging cookies between a local web server and an internet web server in PHP, the main challenge is ensuring that the domain and path settings of the cookies are correctly configured. This is important because cookies are tied to specific domains and paths, and if these settings are not consistent between the two servers, the cookies may not be shared properly.

// Set cookie with correct domain and path settings
setcookie("cookie_name", "cookie_value", time() + 3600, "/", "example.com");