​centos6.8 yum怎么安装php?

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Centos6.8安装php5.6

检查当前安装的PHP包
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yum list installed | grep php

如果有安装的PHP包，先删除他们, 如:
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yum remove php.x86_64 php-cli.x86_64 php-common.x86_64

配置安装包源:
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# 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
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rpm -qa | grep webstatic
rpm -e  [上面搜索到的包即可]

执行安装
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yum -y install php56w.x86_64
yum -y --enablerepo=webtatic install php56w-devel
yum -y install php56w-pdo php56w-xml php56w-gd php56w-gd.x86_64 php56w-ldap.x86_64 php56w-mbstring.x86_64 php56w-mcrypt.x86_64 php56w-mysql.x86_64 php56w-pdo.x86_64 php56w-opcache.x86_64

安装PHP FPM
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yum -y install php56w-fpm
#设置php-fpm开机启动
chkconfig php-fpm on
#启动php-fpm
/etc/init.d/php-fpm start

注：如果想更换到php5.5或5.4版本, 直接把上面的56w换成55w或者54w就可以了