默認的版本太低了，手動安裝有一些麻煩，想采用Yum安裝的可以使用下面的方案：
1.檢查當前安裝的PHP包
yum list installed | grep php
如果有安裝的PHP包，先刪除他們
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
2.Centos
rpm -Uvh http://mirror.webtatic.com/yum/el5/latest.rpm ##CentOs 5.x rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm ##CentOs 6.x rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm ##CentOs 7.X rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
如果想刪除上面安裝的包，重新安裝
rpm -qa | grep webstatic rpm -e 上面搜索到的包即可
3.運行yum install
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 yum install php56w.x86_64 php56w-cli.x86_64 php56w-common.x86_64 php56w-gd.x86_64 php56w-ldap.x86_64 php56w-mbstring.x86_64 php56w-mcrypt.x86_64 php56w-mysql.x86_64 php56w-pdo.x86_64
注：如果想升級到5.6把上面的55w換成56w就可以了。
yum install php70w.x86_64 php70w-cli.x86_64 php70w-common.x86_64 php70w-gd.x86_64 php70w-ldap.x86_64 php70w-mbstring.x86_64 php70w-mcrypt.x86_64 php70w-mysql.x86_64 php70w-pdo.x86_64
4.安裝PHP FPM
yum install php55w-fpm yum install php56w-fpm yum install php70w-fpm