文档：
https://help.aliyun.com/document_detail/91771.html?spm=a2c4g.11186623.2.13.3c4b6eddYRonyS#concept-nhs-ldt-2fb
demo下载：
http://docs-aliyun.cn-hangzhou.oss.aliyun-inc.com/assets/attach/92590/APP_zh/1539603337889/aliyun-oss-appserver-php-master.zip?spm=a2c4g.11186623.2.14.20a57763menF4Z&file=aliyun-oss-appserver-php-master.zip
