Centos php5.6 installation method: first delete the old php; then add the third-party yum source and install the required php version; finally restart the apache service through the command "service httpd restart".

centos tutorial 》

CentOS 6.5 Install php 5.6 method

Delete the old php

yum list installed | grep php #可以查看所有已安装的php软件yum remove php* #删除所有php软件

Add third-party yum source

yum list php*  #查看是否有你需要的php版本，没有的话就需要下面的添加yum 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

php56w

yum install php56w #安装php5.6

php -v #安装完成后查看当前版本#会显示下面的内容PHP 5.6.26 (cli) (built: Sep 17 2016 13:45:08) 
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies#安装成功

Restart apache service

service httpd restart  #如果不重启，在页面中运行phpinfo()你会发现还是原来的版本

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