转自自己的博客：https://www.wygdbb.com/2020/05/centos-install-composer/
宝塔安装PHP环境后，用脚本安装Composer，发现缺少依赖！
- 安装 Composer
curl -sS https://getcomposer.org/installer |php
sudo mv composer.phar /usr/local/bin/composer
- 安装依赖
sudo dnf install php-cli php-json php-zip curl unzip
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