Create a PHP script to check if files (PHP / HTML / ...) have not changed on servers (Ubuntu) or on the Internet.

- Check the specified files (path) on servers via sFTP. - Check if the content of the web address (URL) was not changed. - Database (MySQL). Store the information which files need to be checked and how... (Budget: $30 - $250 USD, Jobs: Linux, MySQL, PHP, Web Hosting)