phpBB is an Internet forum package written in the PHP scripting language. The name "phpBB" is an abbreviation of PHP Bulletin Board.

Features of phpBB include support for multiple database engines (PostgreSQL, SQLite, MySQL, Oracle Database, Microsoft SQL Server), flat message structure (as opposed to threaded), hierarchical subforums, topic split/merge/lock, user groups, multiple attachments per post, full-text search, plugins and various notification options (e-mail, Jabber instant messaging, ATOM feeds)