Answers for "restart php 8 for ubuntu"

ubuntu restart php-fpm

service php-fpm restart    # typical
service php5-fpm restart   # debian-style
service php7.0-fpm restart # debian-style PHP 7
service php7.2-fpm restart # debian-style PHP 7.2
service php7.4-fpm restart # debian-style PHP 7.4

ubuntu restart php

#check version first
php --version
#status
service php7.4-fpm status
#restart
service php7.4-fpm restart
#reload
service php7.4-fpm reload
#force-reload
service php7.4-fpm force-reload
#start
service php7.4-fpm start
#stop
service php7.4-fpm stop

#or
/etc/init.d/php7.4-fpm restart