Changing the PHP version for a domain via the Plesk Panel

1- Login to the Plesk Panel:https://psaXXX.his.com:8443/
(replace this with the real URL of your Plesk Panel.)

2- Once logged in, click on
Websites&Domains->->PHP Settings
and change the PHP version to the one you need for WordPress or your plugin.

3- Click OK to make the change.