Nested Boolean Filter

nbfilter is a reimplementation of a filtering system I created for CONNECT using video games.

Setup

Install MySQL and PHP's PDO and JSON extensions.
Create a MySQL user for this if desired and change the PDO arguments in nbfilter.php to match.
Run CREATE DATABASE games; in the MySQL shell and import the database either by use games; source games.sql or mysql -u root games < games.sql in the UNIX shell (add -p if your login has a password).

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