How can PHP developers troubleshoot and resolve errors related to reading cookies in their scripts on different web servers?

When PHP developers encounter errors related to reading cookies in their scripts on different web servers, they can troubleshoot and resolve the issue by checking if the cookie is being set properly, ensuring the cookie's path and domain are correctly specified, and verifying that the cookie is not expired. Additionally, developers can use PHP's setcookie() function to explicitly set the cookie parameters to ensure consistent behavior across different servers.

// Set a cookie with explicit parameters
setcookie('cookie_name', 'cookie_value', time() + 3600, '/', 'example.com', false, true);

// Read the cookie value
$cookie_value = $_COOKIE['cookie_name'];