Some settings on your machine make Composer unable to work properly.Make sure that you fix the issues listed below and run this script again: The openssl extension is missing, which means that secure HTTPS transfers are impossible.If possible you should enable it or recompile php with --with-openssl
没有openssl扩展 cd php7.0/ext/openssl // 进入到openssl文件,注意自己的php版本 phpize // 运行phpize