PHP json_encode从unicode字符返回null值

Question

我有以下数组：

Array
(
    [BookDateID] => 4
    [HotelName] => Adams’ Inn
)

输出：

{"BookDateID":"4","HotelName":null}

任何魔法？

BTW，我有一个替代解决方案，通过循环每个数组并让它们mb_convert_encoding（str，'HTML-ENTITIES'）但我希望该字符保持不变，因为我必须将其插入DB。

foreach($array as $key=>$value){
    $array[$key] = mb_convert_encoding($value,'HTML-ENTITIES');
}

Answer 1

json_encode需要UTF-8编码数据。确保数据是UTF-8编码的;目前它可能是Latin-1编码的。如何做到这一点取决于数据来自何处。阅读What Every Programmer Absolutely, Positively Needs To Know About Encodings And Character Sets To Work With Text和Handling Unicode Front To Back In A Web App。