删除旧php包
yum remove php.x86_64 php-cli.x86_64 php-common.x86_64 php-gd.x86_64 php-ldap.x86_64 php-mbstring.x86_64 php-mcrypt.x86_64 php-mysql.x86_64 php-pdo.x86_64
配置epel源
yum install -y epel-release wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
配置remi源
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
安装php5.6.x
yum install --enablerepo=remi --enablerepo=remi-php56 php php-opcache php-devel php-mbstring php-mcrypt php-mysqlnd php-phpunit-PHPUnit php-pecl-xdebug php-pecl-xhprof
安装php-fpm
yum install --enablerepo=remi --enablerepo=remi-php56 php-fpm
配置开机启动服务
systemctl restart php-fpm systemctl enable php-frm
原文：https://www.cnblogs.com/powpoia/p/12779182.html