Log in to the cPanel
Go to: https://your-domain- name/cPanel
Enter your username and password...
Click "Log in"
Within cPanel, scroll down to MultiPHP Manager and click on it.
Select the domain you want to upgrade by checking the box on its left side.
In the top-right corner of the page, select the desired PHP version and click Apply.
A pop-up in the upper right corner will notify you of the successful change.
Visit your site to confirm that the change has kept your site intact!
If your site shows a critical error, reverse the upgrade by repeating the above.
If the desired version isn't available, please feel free to contact our support.