PHP+JSON输出汉字

<?php 
function Notice(){
    include './include/conn.php';  //数据库链接文件
    $sql_notice = 
mysql_query
('SELECT * FROM gg_notice where enable = "1" limit 0,10');
    $notice = 
mysql_fetch_array
($sql_notice, MYSQL_ASSOC);
    $str = json_encode($notice);
    //linux
    return preg_replace("#\u([0-9a-f]{4})#ie", "iconv('UCS-2BE', 'UTF-8', pack('H4', '\1'))", $str);
    //windows
    //return preg_replace("#\u([0-9a-f]{4})#ie", "iconv('UCS-2LE', 'UTF-8', pack('H4', '\1'))", $str);
    
}
?>

 <?php
/*** json 生成,分析 支持中文
 */
class Json_Helper {
    /**
     * 生成json
     */
    public static function encode($str){
        $json = json_encode($str);
        //linux
        return preg_replace("#\u([0-9a-f]{4})#ie", "iconv('UCS-2BE', 'UTF-8', pack('H4', '\1'))", $json);
        //windows
        //return preg_replace("#\u([0-9a-f]{4})#ie", "iconv('UCS-2LE', 'UTF-8', pack('H4', '\1'))", $json);
    }
        /**
     * 分析json
     */
    public static function decode($str) {
        return json_decode($str);
    }
}
?>