What are the potential pitfalls of relying on session cookies in PHP, especially when it comes to compatibility with different browsers like Internet Explorer?

Session cookies in PHP can be problematic when it comes to compatibility with different browsers like Internet Explorer because some versions of IE may have issues handling session cookies. To ensure compatibility, it's best to set the session cookie parameters explicitly, such as specifying the cookie path and domain. This can help prevent any unexpected behavior or errors when using session cookies in PHP.

// Set session cookie parameters explicitly for compatibility with different browsers
session_set_cookie_params(0, '/', '.yourdomain.com');
session_start();