1、查看版本

[root@web-1 blog]# php -v

No log handling enabled - turning on stderr logging

Created directory: /var/lib/net-snmp/mib_indexes

PHP 5.3.3 (cli) (built: Mar 22 2017 12:27:09)

Copyright (c) 1997-2010 The PHP Group

Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

2、卸载

[root@web-1 blog]# yum remove php-common

[root@web-1 yum.repos.d]# php -v

-bash: /usr/bin/php: No such file or directory

3、安装yum源

[root@web-1 yum.repos.d]#  rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm

4、安装php7

[root@web-1 epel]# yum install php70w php70w-opcache

[root@web-1 epel]# php -v

PHP 7.0.18 (cli) (built: Apr 15 2017 07:29:51) ( NTS )

Copyright (c) 1997-2017 The PHP Group

Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies

    with Zend OPcache v7.0.18, Copyright (c) 1999-2017, by Zend Technologies