快如闪电的安装php（centos8）本文只考虑centos8
remi是一个php安装仓库。是rpm包。
用了国内镜像会速度极快，下载包的速度：3mb/秒，惊人的快！
无论docker还是centos环境都非常的快！！
首先，安装阿里的 centos 仓库。curl -o /etc/yum.repos.d/centos-base.repo https://mirrors.aliyun.com/repo/centos-8.reporm -f /etc/yum.repos.d/centos-centosplus.reporm -f /etc/yum.repos.d/centos-powertools.reporm -f /etc/yum.repos.d/centos-extras.reporm -f /etc/yum.repos.d/centos-appstream.repodnf makecachednf repolist
安装阿里的 epel 仓库。dnf install -y epel-releasesed -i 's|^#baseurl=https://download.fedoraproject.org/pub|baseurl=https://mirrors.aliyun.com|' /etc/yum.repos.d/epel*sed -i 's|^metalink|#metalink|' /etc/yum.repos.d/epel*dnf makecachednf repolist
安装阿里的 remi 的仓库dnf install -y https://mirrors.aliyun.com/remi/enterprise/remi-release-8.rpmsed -i 's/https*:\/\/rpms.remirepo.net/https:\/\/mirrors.aliyun.com\/remi/g' /etc/yum.repos.d/remi*sed -i 's/#baseurl/baseurl/g' /etc/yum.repos.d/remi*
快如闪电的最关键是下一句，清除镜像列表！！否则又去读取国外的镜像了。
sed -i 's|^mirrorlist|#mirrorlist|' /etc/yum.repos.d/remi*dnf makecachednf repolist
安装 phpdnf install -y yum-utilsdnf install -y php74 php74-php-devel php74-php-fpm php74-php-mbstring php74-php-memcache php74-php-memcached php74-php-redis php74-php-mysqlnd php74-php-pdo php74-php-bcmath php74-php-xml php74-php-gd php74-php-gmp php74-php-igbinary php74-php-imagick php74-php-mcrypt php74-php-pdo_mysql php74-php-posix php74-php-simplexml php74-php-opcache php74-php-xsl php74-php-xmlwriter php74-php-xmlreader php74-php-swoole php74-php-zip php74-php-phalcon php74-php-yaml php74-php-yar php74-php-yaf php74-php-uuid
体验到快如闪电的速度了吧！
最后安装阿里的 composer 镜像源ln -s /usr/bin/php74 /usr/bin/phpcurl -o /usr/local/bin/composer https://mirrors.aliyun.com/composer/composer.pharchmod +x /usr/local/bin/composer
注意观察，确认安装成功，且大版本是2.0
composer -v
立刻设置composer 的镜像源为阿里
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
安装 nginxcat>/etc/yum.repos.d/nginx.repo<