json_encode($data, JSON_UNESCAPED_UNICODE); //必须PHP5.4+  

function encode_json($str) {

    return urldecode(json_encode(url_encode($str)));

}  

/**

 *

 */

function url_encode($str) {

    if(is_array($str)) {

        foreach($str as $key=>$value) {

            $str[urlencode($key)] = url_encode($value);

        }

    } else {

        $str = urlencode($str);

    }  

    return $str;

}