Downgrade php 8.0 to 7.4

sudo yum install yum-utils -y

 1049  sudo yum-config-manager --disable remi-php5*

 1050  sudo yum-config-manager --disable remi-php80

 1051  sudo yum-config-manager --disable remi-test

 1052  sudo yum-config-manager --enable remi-php74

 1053  sudo yum remove php php-* -y   (Remove php)

 1054  sudo yum install roundcube phpmyadmin -y  (optional)

 1061  sudo dnf install php php-cli php-common

 1062  php -version

 1063  sudo service httpd restart

Upgrade php 7 to 8 (7.4 to 8.0)

 For Redhat(RHEL 7)  or centos 7

sudo yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

 1001  sudo yum install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm

 1002  sudo yum -y install yum-utils

 1003  sudo yum-config-manager --disable 'remi-php*'

 1005  sudo dnf install php php-cli php-common

 1006  sudo yum-config-manager --disable remi-php54

 1007  sudo yum-config-manager --disable remi-php74

 1008  sudo yum-config-manager --enable remi-php80

 1009  sudo yum update

 1010  php -v

* Want to disable last remi and enable new remi