1) Login to CPanel of the website on which you want to install phpBB.
2) Search for “Softaculous” icon and click on it. It will launch, and the following screen will appear. Click on the “phpBB” listed under the Forums section.
3) Once you click on “phpBB” it will show you the Overview page of phpBB Version 3.0.8
4) Now, click on the “Install” tab, it will take you to the installation steps. Fill the required information shown in the image below:
5) Click on the “Install “button at the bottom of the form to finish the installation. Once the installation is successful, the following message will appear on your screen, “Congratulations, the software was installed successfully.”