php json 中文乱码

方法一：

    <?php
    $code = json_encode($str);
    $code = preg_replace("#\\\u([0-9a-f]+)#ie", "iconv('UCS-2', 'UTF-8', pack('H4', '\\1'))", $code);
    ?>

方法二： 

    <?php
    // 将数组转换成Json格式，中文需要进行URL编码处理
    function Array2Json($array) {
        arrayRecursive($array, 'urlencode', true);
        $json = json_encode($array);
        $json = urldecode($json);
        // ext需要不带引号的bool类型
        $json = str_replace("\"false\"","false",$json);
        $json = str_replace("\"true\"","true",$json);
        return $json;
    }
    function arrayRecursive(&$array, $function, $apply_to_keys_also = false)
    {
        static $recursive_counter = 0;
        if (++$recursive_counter > 1000) {
            die('possible deep recursion attack');
        }
        foreach ($array as $key => $value) {
            if (is_array($value)) {
                arrayRecursive($array[$key], $function, $apply_to_keys_also);
            } else {
                $array[$key] = $function($value);
            }
            if ($apply_to_keys_also && is_string($key)) {
                $new_key = $function($key);
                if ($new_key != $key) {
                    $array[$new_key] = $array[$key];
                    unset($array[$key]);
                }
            }
        }
        $recursive_counter--;
    }
    ?>