微信公众平台消息接口开发（50）在线点歌/在线音乐

http://api2.sinaapp.com/search/music/?appkey=0020130430&appsecert=fa6095e1133d28ad&reqtype=music&keyword=%e6%9c%80%e7%82%ab%e6%b0%91%e6%97%8f%e9%a3%8e

{
    "errcode": 0,
    "msgtype": "music",
    "music": {
        "title": "最炫民族风",
        "description": "music",
        "musicurl": "http://stream10.qqmusic.qq.com/31432174.mp3",
        "hqmusicurl": "http://stream10.qqmusic.qq.com/31432174.mp3"
    }
}

{
    "errcode": "1",
    "msgtype": "text",
    "text": {
        "content": "检索音乐失败！"     }
}

else if(substr($keyword,0,6) == "点歌"){
    $entityName = trim(substr($keyword,6,strlen($keyword)));
    if ($entityName == ""){
        $contentStr = "发送“点歌”加上歌名，如“点歌最炫民族风”";
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
        return $resultStr;
    }
    $apihost = "http://api2.sinaapp.com/";
    $apimethod = "search/music/?";
    $apiparams = array('appkey'=>"0020120430", 'appsecert'=>"fa6095e113cd28fd", 'reqtype'=>"music");
    $apikeyword = "&keyword=".urlencode($entityName);
    $apicallurl = $apihost.$apimethod.http_build_query($apiparams).$apikeyword;
    $api2str = file_get_contents($apicallurl);
    $api2json = json_decode($api2str, true);
    $musicUrl = $api2json['music']['hqmusicurl'];
    if ($musicUrl == ""){
        $contentStr = "没有找到音乐，可能不是歌名或者检索失败，请换首歌试试！";
        $resultStr = $this->transmitText($object, $contentStr, $funcFlag);
    }else{
        $musicArray = array("title"=>$api2json['music']['title'],
                            "description"=>$api2json['music']['description'],
                            "MusicUrl"=>$api2json['music']['musicurl'],
                            "HQMusicUrl"=>$api2json['music']['hqmusicurl']);
        $resultStr = $this->transmitMusic($object, $musicArray, $funcFlag);
    }
    return $resultStr;
}

ToUserName  接收方帐号（收到的OpenID）
FromUserName  开发者微信号
CreateTime  消息创建时间
MsgType  music
MusicUrl  音乐链接
HQMusicUrl  高质量音乐链接，WIFI环境优先使用该链接播放音乐
FuncFlag  位0x0001被标志时，星标刚收到的消息。

1. 发送“点歌”加歌名，如“点歌最炫民族风”，返回指定的歌曲。
2. 只发送“点歌”两个字，系统为您选择一首热门歌曲。
3. 按住说话按钮2秒钟再松开，随机返回一首热门歌曲。