前端相关那些事 1

ajax  

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. inUnknownon line0

Warning:  Cannot modify header information - headers already sent inUnknownon line0

post  数据是否必须有  

php.ini  改成 -1 

always_populate_raw_post_data = -1

或者 在 请求的时候 保留 默认值