composer 下载太慢

转载：https://blog.youkuaiyun.com/hu_feng903/article/details/51952836

执行命令行  该命令是修改config.json配置

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

然后在自己项目里面的composer.json文件里面添加如下：

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