安装composer

wget curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer

设置国内镜像源姿势一 之 全局配置

composer config -g repo.packagist composer https://packagist.phpcomposer.com

设置国内镜像源姿势之一 之 单项目配置

composer config repo.packagist composer https://packagist.phpcomposer.com

设置国内镜像源姿势之一 之 composer.json

"repositories": {
    "packagist": {
      "type": "composer",
       "url": "https://packagist.phpcomposer.com"
    }
}