定制 packaged/polyfill-php71 二次开发
按需修改功能、优化性能、对接业务系统，提供一站式技术支持
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最新稳定版本：1.1.0
Composer 安装命令：
composer require packaged/polyfill-php71
Importing this package into your composer requirements will replace the symfony polyfill-php71 package if you already have php 7.1 or greater