Good way to add epel and remi repos in RHEL/Centos

epel_remi_install.sh

if grep -q -i "release 6" /etc/redhat-release
then
  echo "RHEL 6 detected"
  # Centos 6/RHEL 6
  yum localinstall -y http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
  yum localinstall -y http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
fi
if grep -q -i "release 7" /etc/redhat-release
then
  echo "RHEL 7 detected"
  # Centos 7/RHEL 7
  yum localinstall -y https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm
  yum localinstall -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm
fi