This plugin grabs your recent phpBB forum topics for you to display in wordpress.

Noted That:

To install correctly this phpbb-recent-topics.zip.
Fisrt Download the phpbb-recent-topics.zip to your computer
Extract/Open phpbb-recent-topics.zip to Your Computer.
Then, Find readme.txt file inside phpbb-recent-topics.zip and Open readme.txt.
Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
Then, Follow the the Tips Below.

Start the Tips:

1. First Download "phpbb-recent-topics.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "phpbb-recent-topics.zip" Downloaded plugin from your computer, Where you downloaded phpbb-recent-topics.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "phpbb_recent_topics" folder is added on left sidemenu. Now, Click on "phpbb_recent_topics" folder.

Noted that: If you do not see "phpbb_recent_topics" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about phpbb_recent_topics Configurtions and Settings or How to work "phpbb_recent_topics" in your WordPress site.

After Activated Plugin According to Step-6 then,

Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
or Direct go to: https://yourdomain/wp-admin/plugins.php
Then, Find "phpbb_recent_topics" Activated Plugin from Plugin List.
Then, Click on "Settings" from Plugin that is phpbb_recent_topics
Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Guide

Guide
Setup your Database Connection, see Other Notes unzip phpbb_recent_topics.zip in your `/wp-content/plugins/` directory. (You’ll have a new directory, with this plugin in `/wp-content/plugins/phpbb_recent_topics`) Activate the plugin through the ‘Plugins’ menu in WordPress Configure the plugin, you need to tell wordpress about phpbb, this is done in the wordpress menu ‘Settings’ -> ‘phpBB Recent Topics’ The following Settings are required: `* The name of your phpBB database (e.g phpbb) * The name of the table where topics are held (the default is phpbb_topics ) * The full url of your forum for links (e.g. http://www.mydomain.com/forum) * The number of topics to show. (If left blank you get 5) * The Date Formatting, i.e. "d/M/y - g:i a" similar to the WordPress "General Settings"` Hit ‘Update Options” To output the list of topics in a page or post… * create a new page/post, type `{phpbb_recent_topics}` , hit 'Publish' or 'Create new page' To output the list of topics in your theme sidebar using the widget… * click “design” in the dashboard * click “widgets” * next to phpBB Recent Topics click “add” * click “save changes” To output the list of topics in your theme sidebar… * edit sidebar.php and inside ` ` type...

Setup your Database Connection, see Other Notes
unzip phpbb_recent_topics.zip in your /wp-content/plugins/ directory. (You’ll have a new directory, with this plugin in /wp-content/plugins/phpbb_recent_topics)
Activate the plugin through the ‘Plugins’ menu in WordPress

Configure the plugin, you need to tell wordpress about phpbb, this is done in the wordpress menu ‘Settings’ -> ‘phpBB Recent Topics’

The following Settings are required:

* The name of your phpBB database (e.g phpbb)
* The name of the table where topics are held (the default is phpbb_topics )
* The full url of your forum for links (e.g. http://www.mydomain.com/forum)
* The number of topics to show. (If left blank you get 5)
* The Date Formatting, i.e. "d/M/y - g:i a" similar to the WordPress "General Settings"

Hit ‘Update Options”
To output the list of topics in a page or post…
```
* create a new page/post, type `{phpbb_recent_topics}` , hit 'Publish' or 'Create new page'
```
To output the list of topics in your theme sidebar using the widget…
* click “design” in the dashboard
* click “widgets”
* next to phpBB Recent Topics click “add”
* click “save changes”
To output the list of topics in your theme sidebar…
```
* edit sidebar.php and inside `` type... 
```

topics, display, wordpress, forum, phpbb, grabs, your, recent, plugin,

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Reffered: https://wordpress.org/