问题是您的文件夹没有写权限.因此，它不会上传文件.

The problem is that your folder is not having write permission. And because of that it is not uploading the file.

您必须授予它写权限.您也可以使用 chmod 授予对该文件夹的写权限.

You have to give it write permission. You can also use chmod for giving write permission to that folder.

还要检查谁对该文件夹具有写权限.当您从代码上传文件时，该文件以Other用户的身份上传.

Also check who is having that write permission for that folder. When you upload the file from code it is uploaded as Other user.

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