WeChat 開発で選択した記事のコード分析をクエリする方法

if(!empty($postStr)){
   
 //解析post来的XML为一个对象$postObj
 $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
 
 $fromUsername = $postObj->FromUserName; //请求消息的用户
 $toUsername = $postObj->ToUserName; //"我"的公众号id
 $keyword = trim($postObj->Content); //用户发送的消息内容
 $time = time(); //时间戳
 $msgtype = 'text'; //消息类型：文本
 $textTpl = "<xml>
    <ToUserName><![CDATA[%s]]></ToUserName>
    <FromUserName><![CDATA[%s]]></FromUserName>
    <CreateTime>%s</CreateTime>
    <MsgType><![CDATA[%s]]></MsgType>
    <Content><![CDATA[%s]]></Content>
    </xml>";

elseif($which == "文章"){
    $ch = curl_init();
    $url = 'http://apis.baidu.com/showapi_open_bus/weixin/weixin_article_type';
    $header = array('apikey: 你自己的apikey');
 
    // 添加apikey到header
    curl_setopt($ch, CURLOPT_HTTPHEADER , $header);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    // 执行HTTP请求
    curl_setopt($ch , CURLOPT_URL , $url);
    $res = curl_exec($ch);
    $res = json_decode($res, true); //获取文章分类name和id
 
    foreach($res['showapi_res_body']['typeList'] as $v){
     $article[] = $v['id'] . "、" . $v['name'];
    }
    sort($article, SORT_NUMERIC);
    foreach($article as $v){
     $contentStr .= $v . "\n";
    }
    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgtype, $contentStr);
    echo $resultStr;
    exit();
    }