How to use yum to install a specified version of php

How to use yum to install a specified version of php: 1. Check the installed php version; 2. Execute the [yum remove php] command to delete the old version of php; 3. Execute [yum install php version number] Just install the command.

Specific method:

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First perform the following Command to view the installed php

yum list installed | grep php

and then delete the old version of php

yum remove php

Then check if there is a php version that you need to install

yum list php*

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If not, you need to add a third-party yum source.

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
//rpmforge
#32位：  
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm  
rpm -ivh rpmforge-release-0.5.1-1.el5.rf.i386.rpm  
#64位：  
wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm  
rpm -ivh rpmforge-release-0.5.1-1.el5.rf.x86_64.rpm

After the addition is completed, you can use the yum repolist command to view the installed sources.

Finally install the specified version of php, for example:

yum install php55w

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