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1. 2021/04/21 23:31:44 [error] 2407875#0: *1535842 FastCGI sent in stderr: "PHP message: PHP 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" while reading response header from upstream, client: 124.237.212.86, server: comm.lli5.com, request: "POST /source/plugin/mdown/index.php?module=resource&action=getRootCategoryList HTTP/1.1", upstream: "fastcgi://unix:/tmp/php-cgi-56.sock:", host: "comm.lli5.com", referrer: "https://xxx/mdown-index.html"

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有提醒改进方向，根据提示操作一下看看