We'll create fresh WordPress site with WP w3all phpBB installed. You have 20 minutes to test the plugin after that site we'll be deleted.
WP w3all phpBB provides free user login and registration integration between a phpBB bulletin board and WordPress CMS.
Integration cookie based between WordPress and phpBB installed on same and subdomains
After the setup and initialization of the plugin, WP users will automatically be added into phpBB when they register in WordPress, while without using the phpBB extension installed into phpBB, if users are allowed to register in phpBB, they will be added into WordPress when they will visit the WordPress side as logged in or at their first login in WordPress (or install the phpBB extension to add users at same time into WordPress when they register in phpBB). But you could use the plugin just only to transfer users between phpBB and WordPress by activating the plugin as not linked (read the help install page), or to show phpBB posts into a WordPress hosted into another domain
WP w3all phpBB is capable of running in iframe mode and automatically embedding phpBB into WordPress template. Setup for the iframe responsive embedded procedure is quick and quite easy!
Transfer WP users into your phpBB forums and vice versa
Option to use phpBB avatars to replace WP Gravatars
It is possible to integrate a WP Multisite network, but linking the same phpBB forum into each subsite
WP w3all phpBB help page with common questions, setup and usage guides, and answers to frequently asked questions to be up and running in minutes are available here:
WP w3all phpBB help page