尝试使用 mb_detect_encoding 函数。这个函数将检查你的字符串，并试图猜它的编码是什么。然后，您可以根据需要进行转换。不过，如果 brulak建议，您***将到 UTF-8，而不是 ，以保留您要传输的数据。

Try using the mb_detect_encoding function. This function will examine your string and attempt to "guess" what its encoding is. You can then convert it as desired. As brulak suggested, however, you're probably better off converting to UTF-8 rather than from, to preserve the data you're transmitting.