删除5.6相关文件
yum install php55w.x86_64 php55w-cli.x86_64 php55w-common.x86_64 php55w-gd.x86_64 php55w-ldap.x86_64 php55w-mbstring.x86_64 php55w-mcrypt.x86_64 php55w-mysql.x86_64 php55w-pdo.x86_64
安装源
rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
yum install php56w
php-fpm安装
yum install php56w-fpm