問題
當你在維護項目時候遇到如下問題：
always_populate_raw_post_data報錯，報錯內容是"不建議使用$HTTP_RAW_POST_DATA"，如圖所示：
Invalid JSON:
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
方法
1 通過修改php.ini配置文件：
2 或者直接升級到php7，官方說明： 點我打開
