错误：
Automatically populating $HTTP_RAW_POST_DATA is deprecated and will be removed in a future version. To avoid this warning set 'always_populate_raw_post_data' to '-1' in php.ini and use the php://input stream instead. in <b>Unknown</b> on line <b>0</b><br />
错误原因：由于PHP版本过高PHP>=5.6,PHP 5.6已经废弃了$HTTP_RAW_POST_DATA。
解决办法：
修改php.ini
always_populate_raw_post_data = -1
