PHP 中国語文字トランスコーディングの例

querys.json:
 {"都市":["u4e0au6d77","u4e1cu839e","u4e2du5c71","u4e3du6c34","u4e4cu9c81u6728u9f50","u4f5bu5c71"," u 4fddu5b9a","u5170u5dde"," u5317u4eac ","u5357u4eac","u5357u5b81","u5357u660c","u5357u901a","u8d35u9633","u8fdeu4e91u6e2f","u90a2u53f0","u90afu90f8","u90d1 u5dde","u 91cdu5e86","u91d1u534e","u94f6u5ddd ", "u9547u6c5f","u957fu6625","u957fu6c99","u9752u5c9b"]}

2, php 漢字変換ファイル test.php

header("content-Type: text/html; charset=Utf-8");
set_time_limit(0);秒数、0 が最大制限です
$file = "querys.json";
$content = file_get_contents($file);
echo $content." " ;
function replace_unicode_escape_sequence($match){
 return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
 }
$str = preg_replace_callback('/\\u([0-9a-f]{4})/i', 'replace_unicode_escape_sequence', $content);
echo $str;
?>