内容纲要
背景
我的 wordpress 运行在 php7.2 上，可以参考这篇文章 centos 8.2 安装 php 7.2.24
wordpress 已经持续提醒我升级 php 好久了，那么今天就来升级吧
先看下当前环境
uname -a
Linux VM-20-15-centos 4.18.0-305.3.1.el8.x86_64 #1 SMP Tue Jun 1 16:14:33 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
php -v
PHP 7.2.24 (cli) (built: Oct 22 2019 08:28:36) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies这个环境和前面那篇安装文可能有点出入，因为我现在用的服务器已经从阿里云 ECS 迁移到腾讯云轻量服务器了
升级
在网上寻摸了一圈，根据教程，升级到 php7.4 需要先安装两个 yum 源
- epel-release
- remi-release
这一步就走了很多弯路，因为你在网上找的教程多半是下面这样的
yum install epel-release
yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm然后你会收获如下的 Error
Error:
Problem: conflicting requests
- nothing provides epel-release = 7 needed by remi-release-7.9-5.el7.remi.noarch嗯，你安装了 epel 8，但是继续安装 remi 7 的时候，它需要 epel 7
接下来很简单，有 2 个解决方案
- 删除 epel 8，重装 epel 7
- 留着 epel 8，安装 remi 8
实际上两个我都试过了，先说安装 epel 7 的遭遇
epel 7
wget https://dl.fedoraproject.org/pub/epel/7/x86_64/Packages/e/epel-release-7-14.noarch.rpm
yum install epel-release-7-14.noarch.rpm
yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm很顺利的，然后是如下的操作
yum install yum-utils -y
yum-config-manager --enable remi-php74
yum update这个时候会收获 Error
Error:
Problem 1: cannot install the best update candidate for package libidn2-2.2.0-1.el8.x86_64
- nothing provides libunistring.so.0()(64bit) needed by libidn2-2.3.4-1.el7.x86_64
Problem 2: package remi-release-7.9-5.el7.remi.noarch requires epel-release = 7, but none of the providers can be installed
- cannot install both epel-release-8-11.el8.noarch and epel-release-7-14.noarch
- cannot install both epel-release-7-14.noarch and epel-release-8-11.el8.noarch
- cannot install the best update candidate for package remi-release-7.9-5.el7.remi.noarch
- cannot install the best update candidate for package epel-release-7-14.noarch
Problem 3: package python3-tracer-0.7.5-2.el8.noarch requires tracer-common = 0.7.5-2.el8, but none of the providers can be installed
- cannot install both tracer-common-1.1-1.el7.noarch and tracer-common-0.7.5-2.el8.noarch
- cannot install the best update candidate for package tracer-common-0.7.5-2.el8.noarch
- cannot install the best update candidate for package python3-tracer-0.7.5-2.el8.noarch看屏幕输出，貌似可以加个 –nobest 来强行安装，实际上的确可以，但是最后安装 php 会报错
yum install php php-mcrypt php-cli php-gd php-curl php-mysql php-ldap php-zip php-process php-ldapError
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel.repo; Configuration: OptionBinding with id "failovermethod" does not exist
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel.repo; Configuration: OptionBinding with id "failovermethod" does not exist
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel.repo; Configuration: OptionBinding with id "failovermethod" does not exist
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist
Invalid configuration value: failovermethod=priority in /etc/yum.repos.d/epel-testing.repo; Configuration: OptionBinding with id "failovermethod" does not exist
CentOS Linux 8 - AppStream 87 B/s | 38 B 00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist经过一番查询，貌似可以用如下办法来解决
-
修改
/etc/yum.repos.d/epel.repo,/etc/yum.repos.d/epel-testing.repo, 将failovermethod行注释 -
执行如下命令
cd /etc/yum.repos.d/
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
yum makecache最后你会沮丧的发现，还是没有办法成功安装 php7.4
epel 8
于是我又回头，决定在 epel 8 下进行安装
dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm这时又会遇到 Error
remi-release-8.rpm 26 kB/s | 32 kB 00:01
Error:
Problem: conflicting requests
- nothing provides (redhat-release >= 8.8 or centos-stream-release >= 8) needed by remi-release-8.8-1.el8.remi.noarch这时可以如下解决
dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
dnf -y install centos-release-stream
dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm这次不报错了，继续
dnf module list php
dnf module reset php
dnf module enable php:remi-7.4
dnf install php php-cli php-common看看 php 版本
php -v
PHP 7.4.33 (cli) (built: Aug 1 2023 08:47:49) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies with Zend OPcache v7.4.33, Copyright (c), by Zend Technologies大功告成，重启 php 即可
service php-fpm restart参考文档
centos 8.2 升级 php7.2 到 7.4
