php生成json或者xml数据

<?php
/**
 * Created by PhpStorm.
 * User: yihuaiyuan
 * Date: 16/10/9
 * Time: 上午9:47
 */
php生成json或者xml数据
vim Response.php
<?php
class Response{
    /**
     *按json方式输出通信数据
     *@param integert $code 状态码
     *@param string $message 提示信息
     *@param array $data 数据
     *return string
     */
    public static function json($code,$message='',$data=array()){

        if(!is_numeric($code)){
            return "";
        }
        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );

        return json_encode($result);

    }

    /**
     *按xml方式输出通信数据
     *@param integert $code 状态码
     *@param string $message 提示信息
     *@param array $data 数据
     *return string
     */
    public static function xmlEncode($code,$message='',$data){
        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'?> 
";
        $xml.="<root> 
";
        $xml.=self::xmlToEncode($result);
        $xml.="</root>";

        return $xml;

    }
    public static function xmlToEncode($data){
        $xml=$attr="";
        foreach($data as $key=>$value){
            if(is_numeric($key)){
                $attr="id='{$key}'";
                $key="item";
            }
            $xml.="<{$key}{$attr}>
";

            $xml.=is_array($value)?self::xmlToEncode($value):$value;

            $xml.="</{$key}> 
";
        }
        return $xml;
    }

    /**
     *按综合方式输出通信数据
     *@param integert $code 状态码
     *@param string $message 提示信息
     *@param array $data 数据
     *@param string $type 数据类型
     *return string
     */
    public static function show($code,$message='',$data=array(),$type='json'){
        if(!is_numeric($code)){
            return "";
        }
        $type=isset($_GET['format'])?$_GET['format']:$type;
        $result=array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );

        if($type == 'json'){
            $json = self::json($code,$message,$data);
            return $json;
        }elseif($type == 'array'){
            return $result;
        }elseif($type == 'xml'){
            $xml = self::xmlEncode($code,$message,$data);
            return $xml;
        }else{
            //TODO
        }
    }
}
?>

vim test.php
<?php
/*直接调用*/
require_once('./Response.php');
$arr = array(
    'id' =>1,
    'name' => 'xiaoming'
);
$xml = Response::show(200,'数据返回成功',$arr);
echo $xml;
?>