Centos7下php5.4升级php7的方法

直接通过yum包管理器安装
yum install php70
发现报错

Loaded plugins: fastestmirror  
Loading mirror speeds from cached hostfile  
 * webtatic: us-east.repo.webtatic.com  
Resolving Dependencies  
--> Running transaction check  
---> Package php56w-gd.x86_64 0:5.6.32-1.w7 will be installed  
--> Processing Dependency: php56w-common(x86-64) = 5.6.32-1.w7 for package: php56w-  gd-5.6.32-1.w7.x86_64  
--> Running transaction check  
---> Package php56w-common.x86_64 0:5.6.32-1.w7 will be installed  
--> Processing Conflict: php56w-common-5.6.32-1.w7.x86_64 conflicts php-common < 5.6  
--> Finished Dependency Resolution  
Error: php56w-common conflicts with php-common-5.4.16-43.el7_4.x86_64  
 You could try using --skip-broken to work around the problem  
 You could try running: rpm -Va --nofiles --nodigest
```  
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发现版本冲突，列出php相关的所有包  
` yum list installed | grep php`  
显示：  

php-cli.x86_64 5.4.16-43.el7_4 @updates
php-common.x86_64 5.4.16-43.el7_4 @updates
php-gd.x86_64 5.4.16-43.el7_4 @updates
php-imap.x86_64 5.4.16-7.el7 @epel
php-ldap.x86_64 5.4.16-43.el7_4 @updates

一一删除之  
`yum remove php-cli.x86_64 `  
`...` 

重新安装  
`yum install php70`  
完成  

~ php -v
PHP 7.0.25 (cli) (built: Oct 29 2017 13:43:03) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
```