For the Download solution, the server must already have PHP 4.3+ and MySQL 4.1+ (or MariaDB) currently installed. No additional configuration of PHP and MySQL is needed. The default configuration values should be ok.
Does PHP Live! use any type of PHP framework? The software does not require PHP frameworks or other extra software.
In terms of server OS, PHP Live! installs on all platforms: UNIX, Mac and Windows.
Most servers these days are quite robust, even at the very minimum hosting package selections. If you intend to deploy PHP Live! on a dedicated server, the amount of resources needed for the software is directly proportional to your website traffic and estimated chat request per day. A very basic server environment should be able to handle 5+ operators online at the same time and a total of 5+ simultaneous chat sessions at the same time.