curl -sS https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer
composer selfupdate # 版本更新
composer install # 安装依赖包
curl -L https://getcomposer.org/composer.phar > /usr/local/bin/composer && \
chmod +x /usr/local/bin/composer && \
composer self-update
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/