安装php

通过yum list php*查看是否有自己需要安装的版本，如果没有就需要添加第三方yum源， 推荐安装webtatic、rpmforge，还有国内163的

1.检查当前安装的PHP包

yum list installed | grep php

如果有安装的PHP包，先删除他们

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 5.X

rpm -Uvh http://mirror.webtatic.com/yum/el5/latest.rpm CentOs 6.x
rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm CentOs 7.X
rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
如果想删除上面安装的包，重新安装
rpm -qa | grep webstatic
rpm -e 上面搜索到的包即可

3.运行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：如果想升级到5.6把上面的55w换成56w就可以了。
4.安装PHP FPM

yum install php55w-fpm
注：如果想升级到5.6把上面的55w换成56w就可以了。