CentOS 通过yum来升级php到php5.6
在文章中，我们将展示在centOS系统下如果将php升级到5.6，之前通过yum来安装lamp环境，直接升级的话，提示没有更新包，也就是说默认情况下php5.3.3是最新1.查看已经安装的php版本号键入下面代码：
php -v或者/usr/bin/php
出现下面代码：
PHP 5.3.3 (cli) (built: Jul 9 2015 17:39:00)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies
2.安装Remi跟EPEL RPM源下载并安装，代码如下：
wget https://dl.fedoraproject.org/pub ... latest-6.noarch.rpm && rpm -Uvh epel-release-latest-6.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm && rpm -Uvh remi-release-6*.rpm
下载之后：
vim /etc/yum.repos.d/remi.repo
然后对里面内容进行以下修改：
name=Remi's RPM repository for Enterprise Linux 6 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/6/remi/$basearch/
mirrorlist=http://rpms.remirepo.net/enterprise/6/remi/mirror
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
还有以下：
name=Remi's PHP 5.6 RPM repository for Enterprise Linux 6 - $basearch
#baseurl=http://rpms.remirepo.net/enterprise/6/php56/$basearch/
mirrorlist=http://rpms.remirepo.net/enterprise/6/php56/mirror
# WARNING: If you enable this repository, you must also enable "remi"
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi
3.现在可以yum命令直接升级了 输入以下代码
yum -y upgrade php*
大概是镜像问题。我得到了报错
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://rpms.remirepo.net/enterprise/6/php55/mirror error was
12: Timeout on http://rpms.remirepo.net/enterprise/6/php55/mirror: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds')
错误：Cannot find a valid baseurl for repo: remi-php55
然后我yum update -y php*就好了 -_-无奈！
一旦更新完毕，再次查看php版本号
php -v
出现以下信息
PHP 5.6.30 (cli) (built: Jan 19 2017 08:09:42)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
到此，php升级完毕
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