Centos下Yum安裝PHP5.5,5.6,7.0
預設的版本太低了，手動安裝有一些麻煩，想採用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 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
如果想刪除上面安裝的包，重新安裝 rpm -qa | grep webstatic rpm -e 上面搜尋到的包即可 3.執行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
yum install php55w-fpm
yum install php56w-fpm
yum install php70w-fpm
注：如果想升級到5.6把上面的55w換成56w就可以了。