composer for Ubuntu

OS：ubuntu 20.10 composer 2.0.4

1.下载最新composer

wget -c https://getcomposer.org/composer.phar

【以下是阿里云地址】

wget -c https://mirrors.aliyun.com/composer/composer.phar

2.可执行权限

chmod u+x composer.phar

3.放置到安装文件夹

mv composer.phar /usr/local/bin/composer

4.执行命令，出现欢迎界面即成功。

composer

5.版本更新

composer self-update

6.全局配置依赖包国内镜像地址

composer config -g repositories.packagist composer http://packagist.phpcomposer.com

【以下是阿里云地址】

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

7.安装依赖包（guzzlehttp）

composer require guzzlehttp/guzzle