Install PHP 7.2 on CentOS from yum

First you need to install Remi repository

https://rpms.remirepo.net

Enable epel repo with

yum install epel-release -y

On CentOS 7

rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-7.rpm

On CentOS 6

rpm -ivh https://rpms.remirepo.net/enterprise/remi-release-6.rpm

Enable PHP 7.2

yum install yum-utils
yum-config-manager --enable remi-php72

To install PHP, run

yum install -y php php-bcmath php-cli php-common php-devel php-gd \
    php-imap php-intl php-json php-ldap php-lz4 php-mbstring php-mysqlnd \
    php-soap php-intl php-opcache php-xml php-pdo

Downgrading PHP version

if you ever want to change PHP version, lets say PHP 7.0, do the following. Remove current PHP

rpm -qa | grep php | xargs yum remove -y

Disable PHP 7.2 repo.

yum-config-manager --disable remi-php72

Enable PHP 7.0 repo

yum-config-manager --enable remi-php70

Now install PHP as above.

PHp Binary

PHP cli will be installed in /usr/bin/php72, you can create a symlink if you want.

PHP-FPM

To install php-fpm module, run

yum install php72-php-fpm -y

To start php-fpm, run

systemctl start php72-php-fpm

See CentOS, php