默认的版本太低了，手动安装有一些麻烦，想采用Yum安装的可以使用下面的方案：

1.检查当前安装的PHP包

yumlistinstalled|grepPHP

如果有安装的PHP包，先删除他们

yumremovePHP.x86_64PHP-cli.x86_64PHP-common.x86_64PHP-gd.x86_64PHP-ldap.x86_64PHP-mbstring.x86_64PHP-mcrypt.x86_64PHP-MysqL.x86_64PHP-pdo.x86_64

2.Centos

rpm-Uvhhttp://mirror.webtatic.com/yum/el5/latest.rpm ##CentOs 5.x
rpm-Uvhhttp:mirror.webtatic.com/yum/el6/latest.rpm ##CentOs6.x
rpm-Uvhhttps:mirror.webtatic.com/yum/el7/epel-release.rpm ##CentOs7.X
rpm-Uvhhttps: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

yuminstallPHP55w.x86_64PHP55w-clicommongdldapmbstringmcrypt-MysqLpdox86_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。

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.安装PHP FPM

yum install PHP55w-fpm
yum install PHP56w-fpm
yum install PHP70w-fpm

systemctl start PHP-fpm