In what scenarios can the issue of cookies not being set on a server, but working on a local environment like EasyPHP, arise in PHP?

The issue of cookies not being set on a server but working on a local environment like EasyPHP can arise due to differences in server configurations. One common reason is that the server may have a stricter security policy that prevents cookies from being set. To solve this issue, you can try setting the cookie parameters explicitly, such as setting the cookie path to '/' to make it available across the entire domain.

setcookie('cookie_name', 'cookie_value', time() + 3600, '/');