- Log in to DirectAdmin and open Select PHP Version (sometimes labelled MultiPHP Manager).
- Choose the domain you want to change.
- Select the PHP version required — check your application's documentation if unsure which one it needs.
- Save; the change applies immediately with no downtime.
Most applications, including recent WordPress versions, run best on the newest stable PHP version available. Older, unmaintained plugins are the most common reason to need an older version instead.