json数据中有特殊字符，该如何处理

有一json如：{"user_info_list":[{"subscribe":1,"nickname":"梁","city":"","province":"巴黎","country":"法国","groupid":0},{"subscribe":1,"nickname":"默笙","city":"O[\q","province":"^N","country":"","groupid":0}]} 用json_decode函数转化为null，原因是"city":"O[\q","province":"^N"受这些影响。该对诸如此类的字符有什么解决的办法没

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有一json如：{"user_info_list":[{"subscribe":1,"nickname":"梁","city":"","province":"巴黎","country":"法国","groupid":0},{"subscribe":1,"nickname":"默笙","city":"O[\q","province":"^N","country":"","groupid":0}]} 用json_decode函数转化为null，原因是"city":"O[\q","province":"^N"受这些影响。该对诸如此类的字符有什么解决的办法没

把字符串里的\转义

如果是字符串 就要变成\\\\

var_dump(json_decode('{"city": "O[\\\\q"}'));

json_decode函数是什么东西？