MySQLTunnel
HTTP tunnel to MySQL written in PHP. Returns JSON descriptive result.
...Written in PHP can be installed in any webserver or hosting with the LAMP or WAMP stack available, to allow access to internal MySQL server. The script will utilize mysqli or mysql extensions, and mcrypt to perform decryption on the request and encryption on the result if needed.
You can also choose whether to expose its functionality upon calling the script with a Web Browser or not. The script is highly configurable, and maintains log files if needed.