达维营-前端网用curl -sS https://getcomposer.org/installer | php 安装composer出现如下错误 Failed to connect to getcomposer.org port 443: Connection timed out 于是找到以下方法便安装成功
//下载安装脚本 － composer-setup.php － 到当前目录
php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"
//执行安装过程。
php composer-setup.php
mv composer.phar /usr/local/bin/composer
//删除安装脚本
php -r "unlink('composer-setup.php');"
更换Packagist中国全量镜像，修改 composer 的全局配置文件
composer config -g repo.packagist composer https://packagist.phpcomposer.com