[Linux] CentOS install PHP7.4 

首先，下載資源：

dnf install dnf-utils http://rpms.remirepo.net/enterprise/remi-release-8.rpm

然後，安裝PHP：

#取得所有可安裝的 PHP 版本列表，預設的版本為 PHP 7.2：
dnf module list php

#Extra Packages for Enterprise Linux Modular 8 - x86_64                                                           39 kB/s | 116 kB     00:02
#Extra Packages for Enterprise Linux 8 - x86_64                                                                  1.2 MB/s | 6.2 MB     00:05
#Remi's Modular repository for Enterprise Linux 8 - x86_64                                                        20 kB/s | 540 kB     00:27
#Safe Remi's RPM repository for Enterprise Linux 8 - x86_64                                                       31 kB/s | 1.4 MB     00:45
#CentOS-8 - AppStream
#Name                      Stream                       Profiles                                       Summary
#php                       7.2 [d]                      common [d], devel, minimal                     PHP scripting language
#php                       7.3                          common, devel, minimal                         PHP scripting language
#
#Remi's Modular repository for Enterprise Linux 8 - x86_64
#Name                      Stream                       Profiles                                       Summary
#php                       remi-7.2                     common [d], devel, minimal                     PHP scripting language
#php                       remi-7.3                     common [d], devel, minimal                     PHP scripting language
#php                       remi-7.4                     common [d], devel, minimal                     PHP scripting language
#
#提示：預設[d]、已啟用[e]、已停用[x]、已安裝[i]

#依據上述 PHP 列表來啟用要安裝的 PHP 版本，這裡啟用 PHP 7.4：
dnf module reset php
dnf module enable php:remi-7.4

#安裝：
dnf install php

移除PHP：

#dnf
sudo dnf list php
sudo dnf remove php*

或

#yum
sudo yum list installed | grep php
sudo yum -y remove php*