If you want to view the PHP version on the hosting, opent the management panel cPanel, go to the section "Software" and click "MultiPHP Manager":
In section "PHP system version" you can view system`s default version of PHP that was set by system administrator.
To change the PHP version for your website, find your domain in section "Set PHP version per domain" and check this box. On the right in the drop down list choose the PHP version that you need:
After that click "Apply":
In the top right corner you will see a notification about version change:
Active PHP ver...