PHP出现Deprecated Automatically populating is deprecated and will be removed in a future version

本地新搭建的PHP环境，出现下面的问题：

Deprecated Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead. in Unknown on line 0
Warning: Cannot modify header information - headers already sent in Unknown on line 0

这个问题和PHP版本有关系，PHP 5.6已经废弃了$HTTP_RAW_POST_DATA。
解决方法：
修改php.ini

always_populate_raw_post_data = -1

重启PHP即可