Although we highly recommend only running the latest version of PHP on your server, sometimes a client might run software that still depends on an older version.
Whether you have one domain or multiple. This is how you change the PHP version for one while leaving the others on the stable version.
1. Log into your cPanel account.
2. In the Software section, click on the MultiPHP Manager Icon (if your host permits or is not using CloudLinux to control PHP versions).
3. Scroll down to the end of the page, select your domain from the left side. Then from the drop-down list on the right side. Select the appropriate PHP version and then click on Apply.
Congratulations, both of your domains using different PHP versions now.
