cent os php从5.3升级到5.6

wordpress默认的php版本为5.3，为了安全性和速度，最好升级到php5.6或7.*。

考虑到兼容性，我选择升级到5.6。

1.首先，查看PHP版本。

[root@vultr ~]# php -v
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.根据操作系统版本安装更新包。

对于cent os 5

rpm -Uvh http://mirror.webtatic.com/yum/el5/latest.rpm

对于cent os 6

rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm

对于cent os 7

rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

3.删除旧版本php并安装新版本php

yum remove php-common

yum install -y php56w php56w-opcache php56w-xml php56w-mcrypt php56w-gd php56w-devel php56w-mysql php56w-intl php56w-mbstring

4.确认php版本已更新为5.6

[root@vultr ~]# php -v
PHP 5.6.37 (cli) (built: Jul 20 2018 18:40:47) 
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies

5.重新启动apache服务以应用更新

/etc/init.d/httpd restart

6.结束