php xml和json数据产生接口

<span style="font-size:18px;">/**
 *  返回结果集
 *
 *  @param   mixed      $info       返回的有效数据集或是错误说明
 *  @param   string     $msg        为空或是错误类型代号
 *  @param   string     $result     请求成功或是失败的标识
 *  @param   int        $post       1为xml方式，2为json方式
 *
 */
function getData($info, $msg = '', $post, $result = 'success')
{
    /* 分为xml和json两种方式 */
    $data_arr = array('result'=>$result, 'msg'=>$msg, 'info'=>$info);
    $data_arr = to_utf8_iconv($data_arr);  //确保传递的编码为UTF-8

    if ($post == 1)
    {
        /* xml方式 */
        if (class_exists('DOMDocument'))
        {
            $doc=new DOMDocument('1.0','UTF-8');
            $doc->formatOutput=true;

            $shopex=$doc->createElement('kewin');
            $doc->appendChild($shopex);

            $result=$doc->createElement('result');
            $shopex->appendChild($result);
            $result->appendChild($doc->createCDATASection($data_arr['result']));

            $msg=$doc->createElement('msg');
            $shopex->appendChild($msg);
            $msg->appendChild($doc->createCDATASection($data_arr['msg']));

            $info=$doc->createElement('info');
            $shopex->appendChild($info);

            create_tree($doc, $info, $data_arr['info']);
            die($doc->saveXML());
        }

        die('<?xml version="1.0" encoding="UTF-8"?>' . array2xml($data_arr)) ;
    }
    else
    {
        /* json方式 */
        $json  = new JSON;
        die($json->encode($data_arr));    //把生成的返回字符串打印出来
    }
}

/**
 *  循环生成xml节点
 *
 *  @param  handle      $doc            xml实例句柄
 *  @param  handle      $top            当前父节点
 *  @param  array       $info_arr       需要解析的数组
 *  @param  boolean     $have_item      是否是数据数组，是则需要在每条数据上加item父节点
 *
 */
function create_tree($doc, $top, $info_arr, $have_item = false)
{
    if (is_array($info_arr))
    {
        foreach ($info_arr as $key => $val)
        {
            if (is_array($val))
            {
                if ($have_item == false)
                {
                    $data_info=$doc->createElement('data_info');
                    $top->appendChild($data_info);
                    create_tree($doc, $data_info, $val, true);
                }
                else
                {
                    $item=$doc->createElement('item');
                    $top->appendChild($item);
                    $key_code = $doc->createAttribute('key');
                    $item->appendChild($key_code);
                    $key_code->appendChild($doc->createTextNode($key));
                    create_tree($doc, $item, $val);
                }
            }
            else
            {
                $text_code=$doc->createElement($key);
                $top->appendChild($text_code);
                if (is_string($val))
                {
                    $text_code->appendChild($doc->createCDATASection($val));
                }
                else
                {
                    $text_code->appendChild($doc->createTextNode($val));
                }
            }
        }
    }
    else
    {
        $top->appendChild($doc->createCDATASection($info_arr));
    }
}

function array2xml($data,$root='shopex'){
    $xml='<'.$root.'>';
    _array2xml($data,$xml);
    $xml.='</'.$root.'>';
    return $xml;
}

function _array2xml(&$data,&$xml){
    if(is_array($data)){
        foreach($data as $k=>$v){
            if(is_numeric($k)){
                $xml.='<item key="' . $k . '">';
                $xml.=_array2xml($v,$xml);
                $xml.='</item>';
            }else{
                $xml.='<'.$k.'>';
                $xml.=_array2xml($v,$xml);
                $xml.='</'.$k.'>';
            }
        }
    }elseif(is_numeric($data)){
        $xml.=$data;
    }elseif(is_string($data)){
        $xml.='<![CDATA['.$data.']]>';
    }
}
</span>

调用方法getData()传入不同的参数可分别生成xml数据或json格式数据

getData($data, ‘‘, ‘json‘);  //返回json数据

{"result":"success","msg":"","info":{"data_info":[{"goods_id":"1","last_modify":"1423937979"},{"goods_id":"2","last_modify":"1425595831"},{"goods_id":"3","last_modify":"1423937959"},{"goods_id":"4","last_modify":"1423942862"}],"counts":"4"}}

getData($data, ‘‘, ‘xml‘);  //返回xml数据

<?xml version="1.0" encoding="UTF-8"?>

<kewin>

<result><![CDATA[success]]></result>

<msg><![CDATA[]]></msg>

<info>

<data_info>

<item key="0">

<goods_id><![CDATA[1]]></goods_id>

<last_modify><![CDATA[1423937979]]></last_modify>

</item>

<item key="1">

<goods_id><![CDATA[2]]></goods_id>

<last_modify><![CDATA[1425595831]]></last_modify>

</item>

<item key="2">

<goods_id><![CDATA[3]]></goods_id>

<last_modify><![CDATA[1423937959]]></last_modify>

</item>

<item key="3">

<goods_id><![CDATA[4]]></goods_id>

<last_modify><![CDATA[1423942862]]></last_modify>

</item>

</data_info>

<counts><![CDATA[4]]></counts>

</info>

</kewin>