You can use CloudLinux's Select PHP Version to change your website's PHP Version in DirectAdmin. CloudLinux provides various PHP Versions to choose from.
1. Log-in to your DirectAdmin account.
2. In the Extra Features section, click on the Select PHP version icon or type Select PHP in the navigation filter box. The option will appear. Click on it.
3. In front of Current PHP version, click on the drop-down menu and choose the version you wish to use.
4. Click Set as current.