onigoetz

This plugin allows to use the password from a working phpBB installation to log into a WordPress blog. or on the other side to log into phpBB with the WordPress user.
The username for the administration must be the same on the two installations. 
Otherwise you will end having admins that have no privileges on the other part.
<h4>How it works</h4>
There is no actual “sync” of the users.
When the app is configured correctly. the app checks that the user who tries to log in is at least registered in one of the systems, if yes, and the password is correct : he’s logged on both systems and his account is created if missing. 
On password change it should also set the password on both platforms.
<h4>WP2BB</h4>
With WP2BB, you can now define that your posts are published in a forum, so that your community can add comments directly on them.
You can add the method “wp2bb()” on your template so that you have links to your forum to add comments and a replies count
There is also a widget to list the last replies in the forums
P.S. : WP2BB was created by Alfredo de Hoces (http://www.alfredodehoces.com/)
<h3>Uninstall</h3>
To uninstall, you have a few steps to make
Go the the Plugin options, revert the “auth mode” to “DB” and not “wpbb” 
If it doesn’t work go to the ACP in General -> Client communication -> Authentication
Then go to the wordpress control panel and disable the plugin.
The last step is then to go with FTP in the PHPBB folder and rename the file “common.php” to “common.wp.php” and the file “common-orig.php” to “common.php”.
Your configurations should be separated again

PHPBB Single Sign On

Authenticate in Wordpress and phpBB at the same time

Nikos Merianos

Because we had some difficulties in the past versions, we have remove some of the features of the plugin. The version 2.0.7 DOES NOT require any donation to remove the backlink. With the new version, you will not be anymore able to autosubmit posts from WordPress into forums as a threads.
The WP phpBB Bridge is the evolution of «WordPress to phpBB3 Bridge». The first version of the plugin was designed to synchronize users of phpBB to WordPress, so when a user log-in to phpBB would be simultaneously connected to WordPress also.
The new version by e-xtnd.it added new features and improvements to exploit many of the features of WordPress previously were not available. Also has been added one new Widget to give more options for your blog.
After activating the Plugin, the user is redirected to connect and disconnect at phpBB. Also keeps the record within the phpBB3 and not WordPress. If a user does not exist in the tables in WordPress, then a new user is created . It should also be noted that after the activation several of the functions of phpBB will be available in WordPress in widget area.
Feature List:
<ul>
<li>Shares user authentication with phpBB3, by forcing phbBB to handle all the authentication.</li>
<li>Adds new users to WordPress user table from the phpBB3 user table.</li>
<li>Synchronizes WordPress user table from phpBB3 user table.</li>
<li>Allows WordPress themes to display current/last visit date/time as displayed in phpBB3</li>
<li>Widget for user login/user information from phpBB3 to be displayed.</li>
<li>Meta links widget that has registration, logging in, WordPress admin, Forum moderation, and Forum administration links. phpBB3 links visible based on user authentication.</li>
<li>Forum links widget that has links to various forum functions and pages based on the phpBB3 user authentication level.</li>
<li>Multilanguage support</li>
<li>Displays latest’s post’s of specific forum id’s</li>
<li>You can create instances of the same widget.</li>
</ul>
New Features
<ul>
<li>New easy way to deactivate the plugin in case you are locked out (There is no need to access again your database to deactivate the WP phpBB Bridge).</li>
<li>A new user-friendly dashboard with a quick view information about plugin status</li>
<li>You can specify the phpBB encoding for the WP phpBB Bridge Topics widget</li>
<li>You can be informed of your server settings, software, memory usage and many other related information</li>
<li>You can download from WP phpBB Bridge dashboard the english language *.po file to translate it into your language.The translations of the previews version 1.x are not compatible with the 2.x version of WP phpBB Bridge.</li>
<li>You can remove the backlink by unchecking only one checkbox</li>
</ul>
for more info visit: http://www.e-xtnd.it/wp-phpbb-bridge/
<h3>Developers</h3>
In new WP phpBB Bridge there are many hooks you can use with your code in order to modify native data, or run some functions in some points of WP phpBB Bridge execution period.
The following hooks are available.
Actions:
<ul>
<li>wpbb_before_init</li>
<li>wpbb_after_init</li>
<li>wpbb_plugin_started</li>
<li>wpbb_includes</li>
<li>wpbb_phpbb_loaded</li>
<li>wpbb_user_object_created</li>
<li>wpbb_authentication_object_created</li>
<li>wpbb_template_object_created</li>
<li>wpbb_cache_object_created</li>
<li>wpbb_db_object_created</li>
<li>wpbb_phpbb_configurations_loaded</li>
<li>wpbb_before_user_session_begin</li>
<li>wpbb_after_user_session_begin</li>
<li>wpbb_before_acl</li>
<li>wpbb_after_acl</li>
<li>wpbb_before_user_setup</li>
<li>wpbb_after_user_setup</li>
<li>wpbb_before_get_user_id</li>
<li>wpbb_return_user_id</li>
<li>wpbb_before_return_username</li>
<li>wpbb_after_return_username</li>
<li>wpbb_styles_loaded</li>
<li>wpbb_scripts_loaded</li>
<li>wpbb_ajax_url_created</li>
<li>wpbb_before_display_warning</li>
<li>wpbb_after_display_warning</li>
<li>wpbb_uninstalled</li>
<li>wpbb_before_flus_rewrite_rules</li>
<li>wpbb_after_flus_rewrite_rules</li>
<li>wpbb_before_add_rewrite_rules</li>
<li>wpbb_after_add_rewrite_rules</li>
<li>wpbb_before_add_query_variables</li>
<li>wpbb_after_add_query_variables</li>
<li>wpbb_before_disable_me</li>
<li>wpbb_after_disable_me</li>
<li>wpbb_before_admin_dashboard</li>
<li>wpbb_after_admin_dashboard</li>
<li>wpbb_before_admin_settings</li>
<li>wpbb_after_admin_settings</li>
<li>wpbb_before_forum_integration</li>
<li>wpbb_after_forum_integration</li>
<li>wpbb_before_author_integration</li>
<li>wpbb_after_author_integration</li>
<li>wpbb_before_donators</li>
<li>wpbb_after_donators</li>
<li>wpbb_before_get_avatar</li>
<li>wpbb_after_get_avatar</li>
</ul>
Filters:
<ul>
<li>wpbb_forums_categories – 1 argument – Array containing forums</li>
<li>wpbb_user_obj – 1 argument – phpBB User object</li>
<li>wpbb_auth_obj – 1 argument – phpBB Auth object</li>
<li>wpbb_template_obj – 1 argument – phpBB Template object</li>
<li>wpbb_cache_obj – 1 argument – phpBB Cache object</li>
<li>wpbb_db_obj – 1 argument – phpBB Database object</li>
<li>wpbb_phpbb_configs – 1 argument – phpBB Configurations object</li>
<li>wpbb_new_username – 1 argument – New username for WordPress database</li>
<li>wpbb_hash_generation – 1 argument – Hash</li>
<li>wpbb_forums_list – 1 argument – Array with forums displayed in Forum Assign page</li>
<li>wpbb_blog_categories – 1 argument – Array containing WordPress categories</li>
</ul>

WP phpBB Bridge

Shares user authentication with phpBB3, by forcing phbBB to handle all the authentication.

PHPBB Single Sign On vs WP phpBB Bridge