PHP封装数据

Response.php

<?php

/**
 * Created by PhpStorm.
 * User: edwin
 * Date: 2017/7/1
 * Time: 01:29
 */
class Response
{
    const JSON = 'json';

    /**
     * @param $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(), $type = self::JSON)
    {
        if (!is_numeric($code)) {
            return '';
        }

        $type = isset($_GET['format']) ? $_GET['format'] : $type;

        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );

        if ($type == 'json') {
            self::json($code, $message, $data);
            exit;
        } else if ($type == 'xml') {
            self::xml($code, $message, $data);
        } else if ($type == 'array') {
            var_dump($result);
        } else {
            //TODO
        }

    }

    /**
     * JSON方式输出通信数据
     * @param $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
        );

        header("Content-Type: charset=utf8; application/json;");
        echo json_encode($result, JSON_UNESCAPED_UNICODE);
        exit;
    }

    /**
     * XML方式输出通信数据
     * @param $code 状态码
     * @param string $message 提示信息
     * @param array $data 数据
     * @return string
     */
    public static function xml($code, $message = '', $data = array())
    {
        if (!is_numeric($code)) {
            return '';
        }
        $result = array(
            'code' => $code,
            'message' => $message,
            'data' => $data
        );

        header("Content-Type: charset=utf8; text/xml;");
        $xml = "<?xml version='1.0' encoding='UTF-8'?>\n";

        $xml .= "<root>\n";

        $xml .= self::xmlTo($result);

        $xml .= "</root>";

        echo $xml;
        exit;
    }

    private static function xmlTo($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::xmlTo($value) : $value;
            $xml .= "</{$key}>\n";
        }
        return $xml;
    }
}