You can change the PHP Version on your sites at any time by logging in to your DirectAdmin control panel and navigating to the “Select PHP version” under the “Extra Features” section.
This will bring you to the PHP Selector and Extensions area.
Once in the PHP Selector and Extensions area, you can choose what PHP version you wish to use. Simply select the desired version from the PHP Version drop-down and click “Set as current” to save your PHP Version changes.