PHP生成接口数据格式（json和xml）

根据慕课网老师singwa教程写的生成接口通信数据 无 /** * 生成接口数据格式 */class Response{ /** * [show 按综合方式输出数据] * @param [int] $code [状态码] * @param [string] $message [提示信息] * @param array $data [数据] * @param [string] $type

根据慕课网老师singwa教程写的生成接口通信数据

/**
 * 生成接口数据格式
 */
class Response{
    /**
     * [show 按综合方式输出数据]
     * @param  [int] $code       [状态码]
     * @param  [string] $message [提示信息]
     * @param  array  $data    [数据]
     * @param  [string] $type  [类型]
     * @return [string]        [返回值]
     */
    public static function show($code, $message, $data = array(),$type = ''){
        if(!is_numeric($code)){
            return '';
        }
        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );
        if($type == 'json'){
            return self::json($code, $message, $data);
        }elseif($type == 'xml'){
            return self::xml($code, $message, $data);
        }else{
            //TODO
        }
    }
    /**
     * [json 按json方式输出数据]
     * @param  [int] $code       [状态码]
     * @param  [string] $message [提示信息]
     * @param  [array]  $data    [数据]
     * @return [string]          [返回值]
     */
    public static function json($code, $message, $data = array()){
        if(!is_numeric($code)){
            return '';
        }
        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );
        $result = json_encode($result);
        return $result;
    }

    /**
     * [xml 按xml格式生成数据]
     * @param  [int] $code       [状态码]
     * @param  [string] $message [提示信息]
     * @param  array  $data      [数据]
     * @return [string]          [返回值]
     */
    public static function xml($code, $message, $data = array()){
        if(!is_numeric($code)){
            return '';
        }
        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );
        header("Content-Type:text/xml");
        $xml = "<?xml version='1.0' encoding='UTF-8'?>\n";
        $xml .= "<root>\n";
        $xml .= self::xmlToEncode($data);
        $xml .= "</root>";
        return $xml;
    }

    public static function xmlToEncode($data){
        $xml = '';
        foreach($data as $key => $value){
            if(is_numeric($key)){
                $attr = "id='{$key}'";
                $key = "item";
            }
            $xml .= "<{$key} {$attr}>\n";
            $xml .= is_array($value) ?  self::xmlToEncode($value) : "{$value}\n";
            $xml .= "</{$key}>\n";
        }
        return $xml;
    }
}

//测试
$grade = array("score" => array(70, 95, 70.0, 60, "70"), "name" => array("Zhang San", "Li Si", "Wang Wu", "Zhao Liu", "TianQi"));
$response = new Response();
$result = $response :: show(200,'success',$grade,'json');
print_r($result);