从JSON.stringify到真正的unicode字符的Unicode字符

Question

我使用JSON.stringify()函数来串联化JS对象，以便将AJAX发送给PHP。

当JSON.stringify函数将unicode字符编码为格式\uxxxx（例如\u000a）时，会出现问题。我的问题是如何在PHP中将这些字符转换为常规的unicode字符？

Answer 1

请参阅Output UTF-16? A little stuck

这将转换为UTF-8：

function unescape_utf16($string) {
    /* go for possible surrogate pairs first */
    $string = preg_replace_callback(
        '/\\\\u(D[89ab][0-9a-f]{2})\\\\u(D[c-f][0-9a-f]{2})/i',
        function ($matches) {
            $d = pack("H*", $matches[1].$matches[2]);
            return mb_convert_encoding($d, "UTF-8", "UTF-16BE");
        }, $string);
    /* now the rest */
    $string = preg_replace_callback('/\\\\u([0-9a-f]{4})/i',
        function ($matches) {
            $d = pack("H*", $matches[1]);
            return mb_convert_encoding($d, "UTF-8", "UTF-16BE");
        }, $string);
    return $string;
}