This is a quick guide on how to install both the Redis PHP extension as well as the daemon via SSH.

Installing the Redis daemon:

for CentOS 6/RHEL 6

rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
yum -y install redis --enablerepo=remi --disableplugin=priorities
chkconfig redis on
service redis start

for CentOS 7/RHEL 7

rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
yum -y install redis --enablerepo=remi --disableplugin=priorities
systemctl enable redis
systemctl start redis

Installing the Redis PHP extension for PHP5.5, PHP5.6 and PHP7.0.

for phpver in 55 56 70 ; do
cd ~
wget https://pecl.php.net/get/redis-3.1.0.tgz
tar -xvf redis-*.tgz
cd redis*
/opt/cpanel/ea-php$phpver/root/usr/bin/phpize
./configure --with-php-config=/opt/cpanel/ea-php$phpver/root/usr/bin/php-config
make && make install
echo 'extension=redis.so' >> /opt/cpanel/ea-php$phpver/root/etc/php.d/redis.ini
cd ~
rm -rf redis*
done
/scripts/restartsrv_httpd
/scripts/restartsrv_apache_php_fpm

All done! Check to make sure the PHP extension is loaded in each version of PHP:

for phpver in 55 56 70 ; do
echo "PHP $phpver" ; /opt/cpanel/ea-php$phpver/root/usr/bin/php -i |grep "Redis Support"
done

Output should be:

PHP 55
Redis Support => enabled
PHP 56
Redis Support => enabled
PHP 70
Redis Support => enabled

Enjoy!

sourced from: https://help.bigscoots.com/cpanel/cpanel-easyapache-4-installing-redis-and-redis-php-extension