AutoIndex is provided under the terms of the GNU General Public License (GPL).
This is a GitHub copy of the code from https://autoindex.sourceforge.net. The project was last updated in 2007 and relies on PHP which is no longer maintained. Since PHP 5 is no longer maintained by the PHP team, this project is considered deprecated and no longer supported.
To install and run the script, simply upload the contents of this directory to a server with PHP support (PHP 5 is required).
Then, point your browser to the index.php file in that folder. The first time you do this, it will take you to a configuration page.
To use all the default values, just click the button at the bottom, or customize it however you want.