What potential issues can arise from not setting the session ID to not be appended to URLs in PHP?

Potential issues that can arise from not setting the session ID to not be appended to URLs in PHP include security risks as the session ID can be exposed in the URL, making it easier for attackers to hijack sessions. To solve this issue, it is recommended to configure PHP to use cookies to store the session ID instead of appending it to URLs.

// Set session ID to not be appended to URLs
ini_set('session.use_trans_sid', false);
ini_set('session.use_only_cookies', true);