Restore Offline Business Website

My website, suddenly gone offline. I’m not sure whether the problem lies with the server, a database connection, or something else entirely. I need you to: • Diagnose the root cause quickly on the existing PHP stack... (Budget: $10 - $30 USD, Jobs: Database Administration, PHP, Technical Support, Troubleshooting, Web Hosting, Web Security, Website Design, Website Management, Website Testing, WordPress)