我使用php从数据库中获取数据，但我遇到了问题。
首先，它是从数据库获取数据的php文件。
{"response":[{"ID":null,"postWriter":null,"postContent":null,"postDate":null,"postPic":null,"postLike":null,"postComments":null,"postLocation":null,"profilePic":null,"postGatherDate":null,"postGatherLocation":null,"postGatherTime":null},{"ID":null,"postWriter":null,"postContent":null,"postDate":null,"postPic":null,"postLike":null,"postComments":null,"postLocation":null,"profilePic":null,"postGatherDate":null,"postGatherLocation":null,"postGatherTime":null},{"ID":null,"postWriter":null,"postContent":null,"postDate":null,"postPic":null,"postLike":null,"postComments":null,"postLocation":null,"profilePic":null,"postGatherDate":null,"postGatherLocation":null,"postGatherTime":null}]}
＆GT;
然而，它返回如下。它具有正确的数据数，但其值均为空。我该如何解决这个问题？
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