How to change the php version to an specific folder

hello im trying to set php 8.1 to a folder using the next code in my .htacess, using your instructions:

url:

http://wiki.centos-webpanel.com/php-selector

code:

AddHandler application/x-httpd-php81 .php

but I have the next error:

"/opt/alt/php81/usr/bin/php-cgi" failed: No such file or directory

Maybe I have this error because I use php-fpm and the correct path is /opt/alt/php-fpm81
but there is not a php-fpm code :/

Could please help me?

Just to be clear, you're using php-fpm with PHP version 8.1? It is a different animal than the PHP Selector versions of PHP.

yes php-fpm 8.1

I installed the cgi version of php 8.0 and it worked. but I read php-fpm was better.