1. 설치
yum install epel-release
sudo rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
yum install php71w php71w-cli php71w-devel php71w-bcmath php71w-common php71w-mcrypt php71w-domxml php71w-gd php71w-imap php71w-mbstring php71w-xmlrpc php71w-pear “Image*”
* PHP 모듈 설치 : php71w-모듈이름
2. apache 재시작
sudo systemctl restart httpd.service