N99panel supports PHP versions right from PHP 7.0 to 8.2. Each website or a VHost can have its own PHP version. While choosing a PHP version, you also get the option to choose maximum PHP processes limit.

Choosing the correct PHP processes limit is very essential in order to manage outages or spikes in the web traffic, and to ensure that the VPS keeps running smoothly.

For a detailed article, please refer to : https://n99panel.com/ufaq/php-versions-and-their-cli-usage/