我有一个看起来像这样的脚本,用于检索人们在LastFM上喋喋不休的歌曲信息:
class NowPlaying{
private $url;
private $noTrackPlayingMessage;
function __construct($user, $api_key){
// construct URL
$this->url = 'http://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&limit=1';
$this->url .= '&user=' . $user . '&api_key=' . $api_key;
// default message
$this->noTrackPlayingMessage = 'Nothing is playing right now!';
}
// return the artist and track currently playing
public function getNowPlaying(){
// create an XML object
$xml = simplexml_load_file($this->url);
// get the latest track
$track = $xml->recenttracks->track;
// check if the track is actually playing
$nowplaying = $track->attributes()->nowplaying;
// return the track and artist if music is playing, otherwise show message
if($nowplaying){
$artist = $track->artist;
$songname = $track->name;
return $artist . ' - ' . $songname;
}
else{
return $this->noTrackPlayingMessage;
}
}
// set the message to be shown when no music is playing
public function setNoTrackPlayingMessage($messageIn){
$this->noTrackPlayingMessage = $messageIn;
}
} // end class
$nowPlaying = new NowPlaying($id, 'APIGOESHERE');
$nowPlaying->setNoTrackPlayingMessage($id); // optional
$currentplaying = $nowPlaying->getNowPlaying();
虽然这对于单独的LastFM帐户很有用,但我希望通过此脚本运行多个帐户,详细信息存储在MySQL数据库中。我的表有两列,lastfmusername和currentsong。我想找到那些lastfm用户正在收听的所有歌曲,然后将它们存储在他们的curreong字段中。
我尝试将以下内容添加到顶部:
$sql = "SELECT lastfmusername FROM data";
$id = $db->query($sql);
接下来到底部:
$sql2 = "UPDATE lastfmtable SET currentsong = '$currentplaying' WHERE lastfmusername = '$id'";
$cursong = $db->query($sql2);
但那失败了所以我不确定如何处理这个问题。任何帮助将不胜感激。
答案 0 :(得分:0)
$sql = "SELECT lastfmusername FROM data";
将返回一个包含lastfmusername的所有值的数组,而不只是一个。
请改为尝试:
$sql = "SELECT lastfmusername FROM data";
$users = $db->query($sql);
$id = $users[0]['lastfmusername'];
含义:$ id现在将存储第一个结果。
您需要遍历用户的结果并为每个用户运行更新查询。所以你要做的事情应该是这样的:
foreach($users as $r){
$id= $r['lastfmusername'];
$nowPlaying = new NowPlaying($id, 'APIGOESHERE');
$nowPlaying->setNoTrackPlayingMessage($id); // optional
$currentplaying = $nowPlaying->getNowPlaying();
$sql2 = "UPDATE lastfmtable SET currentsong = '$currentplaying' WHERE lastfmusername = '$id'";
$cursong = $db->query($sql2);
}