卸载旧版本php
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
添加reml repo
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
安装php5.6
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