How to Install PHP 7 or 7.1 on CentOS 7

PHP (recursive acronym for PHP: Hypertext Preprocessor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.
Php 7.0:-
yum install epel-release
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
yum install php70w php70w-fpm php70w-cli php70w-common php70w-xml php70w-soap php70w-xmlrpc php70w-mbstring php70w-json php70w-gd php70w-mcrypt
Verify Install PHP Version :- php -v
To find out other available php modules.:- yum search php70
yum -y install php70w-fpm php70w-cli php70w-gd php70w-mcrypt php70w-mysql php70w-pear php70w-xml php70w-mbstring php70w-pdo php70w-json php70w-pecl-apcu php70w-pecl-apcu-devel

PHP 7.1:-
rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
yum install -y mod_php71w php71w-cli php71w-common php71w-gd php71w-mbstring php71w-mcrypt php71w-mysqlnd php71w-xml

source

centos 7