How to configure existing php into ispconfig

Hi
Am using ispconfig on debian 9.
Php7.2, 7.0, 7.4 and 8 are already installed.
So i don't need to install then anymore? So how to use them as php alternative into ispconfig3?

Thank you for the help.

 

add them as additional php's in the ispconfig interface. there's several tutorials / posts on here showing how to do that.
once you've done that, just select the php version you want to use on each individual website from that websites settings page.

step 2:
How to install PHP 5.6 and 7.0 - 7.4 as PHP-FPM & FastCGI for ISPConfig 3.1 with apt on Debian 8 to 10 (howtoforge.com)

 

Thank you for your quick reply broo.
I did it!! but when i added for example php7.2 in the configuration the website just got 500 Error.
Let me see where the tutorial show how to configure existing php versions.
Thank you