Php 通过API获取YouTube用户的完整播放列表

下面是我获取youtube用户公共播放列表的代码：

function getyoutubeplaylists($userName) {
$yt = connectyoutube();
$yt->setMajorProtocolVersion(2);
$playlistListFeed = $yt->getPlaylistListFeed($userName);
foreach ($playlistListFeed as $playlistListEntry) {
    $playlist['title'] = $playlistListEntry->title->text;
    $playlist['id'] = $playlistListEntry->getPlaylistID();
    $playlists[] = $playlist;
    $playlistVideoFeed = $yt->getPlaylistVideoFeed($playlistListEntry->getPlaylistVideoFeedUrl());
    foreach ($playlistVideoFeed as $videoEntry) {
        $playlist_assignment['youtube_id'] = substr($videoEntry->getVideoWatchPageUrl(),31,11);
        $playlist_assignment['id'] = $playlist['id'];
        $playlist_assignments[] = $playlist_assignment;
    }
}
$everything['playlists'] = $playlists;
$everything['playlist_assignments'] = $playlist_assignments;
return $everything;
}

//////////////////////////////////////////////////////////////////////
// Videos themselves
$idx=count($playlists);
$userFeed = $yt->getUserUploads($userName);
foreach ($userFeed as $videoEntry) {
    $idx++;
    $_id=substr($videoEntry->getVideoWatchPageUrl(),31,11);
    if( ! in_array($_id, $playlistvideos) ) {
        $_url=$videoEntry->getVideoWatchPageUrl();
        $playlists[$idx]['id']=$_id;
        $playlists[$idx]['url']=$_url;
        $playlists[$idx]['title']=$videoEntry->title->text;
        $playlists[$idx]['views']=$videoEntry->getVideoViewCount();
        $playlists[$idx]['rating']=$videoEntry->getRating()->average;
        $thumbs=$videoEntry->getVideoThumbnails();
        // these need resizing to width="320" height="180"
        $playlists[$idx]['thumb']=$thumbs[0]['url'];
        $playlists[$idx]['time']=$videoEntry->getVideoDuration();
    } // else { echo "$_id already in playlist\n";  }
}

问题是，这只会得到第一页或结果。关于如何使用Zend Gdata检索下一页结果有什么想法吗

原始gdata XML显示了所需的URL：

<link rel="self" type="application/atom+xml" href="http://gdata.youtube.com/feeds/api/users/pennstate/playlists?start-index=1&amp;max-results=25"/>
<link rel="next" type="application/atom+xml" href="http://gdata.youtube.com/feeds/api/users/pennstate/playlists?start-index=26&amp;max-results=25"/>

---

但是，GetPlaylistFeed似乎没有任何参数来指定“开始索引”或“最大结果”。

这听起来像是您想要遵循。这是一个有用的Zend函数，不仅可以检索下一页，还可以检索提要的所有可用条目

 $playlistListFeed = $yt->retrieveAllEntriesForFeed($yt->getPlaylistListFeed($userName));

由于我浪费了一整天的时间“只是想在我的网站上显示我的视频列表”，我想我应该粘贴一些示例代码，这些代码教会了我很多东西。正如所料，

Zend_Gdata_YouTube:：

已经在Magento安装中。下面的代码将显示一个统一的“视频”列表，其中播放列表与其他视频并排显示在列表中相同。更新：我发了一封信

这只是我放入var/export中的一个通用php。在顶部，您必须包括

app/Mage.php

<?
$userName='cacycleworksdotcom';
$yt = new Zend_Gdata_YouTube();
//////////////////////////////////////////////////////////////////////
// Get playlists.
$playlistListFeed = $yt->retrieveAllEntriesForFeed($yt->getPlaylistListFeed($userName));
$playlist=Array();
$videoEntry=NULL;
$playlistvideos=Array();

现在，在播放列表中，我查看此播放列表的视频并收集每个播放列表的统计信息。我将他们的时间相加，得到总播放时间，然后从播放列表中的视频中捕获最高的观看次数和评级

    foreach ($playlistVideoFeed as $videoEntry) {
        // info of each video inside this playlist
        $_id=substr($videoEntry->getVideoWatchPageUrl(),31,11);
        $playlistvideos[]=$_id;
        $_url=$videoEntry->getVideoWatchPageUrl();
        $playlists[$idx]['videos'][$_id]=$_url;
        $playlists[$idx]['time']+=$videoEntry->getVideoDuration();
        $_views=$videoEntry->getVideoViewCount();
        if( $_views > $playlists[$idx]['views'] )
            $playlists[$idx]['views']=$_views;
        $_rating=$videoEntry->getRating()->average;
        if( $_rating > $playlists[$idx]['rating'] )
            $playlists[$idx]['rating']=$_rating;
    }

我最终使用XML来获取缩略图数据

    $xml=$playlistListEntry->getXML();
    // $playlists[$idx]['xml']=$xml;    // store original XML for now
    $xml = simplexml_load_string($xml); // transfer into object
    $attrs=$xml->group->thumbnail[1];
    $playlists[$idx]['thumb']=(string)$attrs['url'];
    //                                1st vid id         playlist id
    // http://www.youtube.com/watch?v=mcnIAErKc-g&list=PLEDADE9CA0E65BA78
    $videoid=array_keys( $playlists[$idx]['videos']);
    $videoid=$videoid[0];
    $playlists[$idx]['url'] = "http://www.youtube.com/watch?v=$videoid&list=PL".$playlists[$idx]['id'];     
}

播放列表已处理完毕，现在让我们获取不在播放列表中的剩余视频：

function getyoutubeplaylists($userName) {
$yt = connectyoutube();
$yt->setMajorProtocolVersion(2);
$playlistListFeed = $yt->getPlaylistListFeed($userName);
foreach ($playlistListFeed as $playlistListEntry) {
    $playlist['title'] = $playlistListEntry->title->text;
    $playlist['id'] = $playlistListEntry->getPlaylistID();
    $playlists[] = $playlist;
    $playlistVideoFeed = $yt->getPlaylistVideoFeed($playlistListEntry->getPlaylistVideoFeedUrl());
    foreach ($playlistVideoFeed as $videoEntry) {
        $playlist_assignment['youtube_id'] = substr($videoEntry->getVideoWatchPageUrl(),31,11);
        $playlist_assignment['id'] = $playlist['id'];
        $playlist_assignments[] = $playlist_assignment;
    }
}
$everything['playlists'] = $playlists;
$everything['playlist_assignments'] = $playlist_assignments;
return $everything;
}

//////////////////////////////////////////////////////////////////////
// Videos themselves
$idx=count($playlists);
$userFeed = $yt->getUserUploads($userName);
foreach ($userFeed as $videoEntry) {
    $idx++;
    $_id=substr($videoEntry->getVideoWatchPageUrl(),31,11);
    if( ! in_array($_id, $playlistvideos) ) {
        $_url=$videoEntry->getVideoWatchPageUrl();
        $playlists[$idx]['id']=$_id;
        $playlists[$idx]['url']=$_url;
        $playlists[$idx]['title']=$videoEntry->title->text;
        $playlists[$idx]['views']=$videoEntry->getVideoViewCount();
        $playlists[$idx]['rating']=$videoEntry->getRating()->average;
        $thumbs=$videoEntry->getVideoThumbnails();
        // these need resizing to width="320" height="180"
        $playlists[$idx]['thumb']=$thumbs[0]['url'];
        $playlists[$idx]['time']=$videoEntry->getVideoDuration();
    } // else { echo "$_id already in playlist\n";  }
}

这里我们有一组youtube视频，顶部是播放列表，按最老的第一顺序排列，然后是用户的视频，这些视频没有以相同的最老的第一顺序出现在播放列表中。所以我找到了这个简单的排序代码来改变顺序。这篇关于排序的文章很棒，如果您在这里尝试对多维数组进行排序，那么值得一读

//////////////////////////////////////////////////////////////////////
// http://www.the-art-of-web.com/php/sortarray/
function orderBy($data, $field) {
    $code = "return strnatcmp(\$a['$field'], \$b['$field']);";
    //  swap $a and $b to make descending instead of ascending
    usort($data, create_function('$b,$a', $code)); //('$a,$b', $code));
    return $data;
}
$playlists = orderBy($playlists, 'views');
//////////////////////////////////////////////////////////////////////
echo "\n\n";
print_r($playlists);

下面是帮助我开始使用这些愚蠢的GData YouTube Zend对象的代码：

echo "\n\n";
show_methods($videoEntry);
echo "\n\n";
show_methods($playlistListFeed[0]);
echo "\n\n";
show_methods($playlistListFeed);

function show_methods( $_a ) {
    echo "<h3>Methods for ".get_class($_a)."</h3>";
    $_a= get_class_methods($_a);
    $_a=array_unique($_a);
    array_multisort(&$_a);
    $i=0;
    foreach( $_a as $method ) {
        $i++;
        printf("%-30.30s",$method);
        if($i%5==0)
            echo "\n";
    }
}

最后，你从

show_methods（）

中得到的东西：

---

我想应该说，我知道我可以修改GetPlaylistFeed以获取所述参数，然后相应地修改URI，但我不知道为什么我在Zend产品中没有发现这么简单的缺点。你能帮我写这篇文章吗

Methods for Zend_Gdata_YouTube_VideoEntry

__construct                   __get                         __isset                       __set                         __toString                    
__unset                       addVideoDeveloperTag          delete                        encode                        ensureMediaGroupIsNotNull     
flushNamespaceLookupCache     getAlternateLink              getAuthor                     getCategory                   getComments                   
getContent                    getContributor                getControl                    getDOM                        getEditLink                   
getEtag                       getExtensionAttributes        getExtensionElements          getFeedLink                   getFlashPlayerUrl             
getHttpClient                 getId                         getLicenseLink                getLink                       getLocation                   
getMajorProtocolVersion       getMediaGroup                 getMediaSource                getMinorProtocolVersion       getNextLink                   
getNoEmbed                    getPreviousLink               getPublished                  getRacy                       getRating                     
getRecorded                   getRights                     getSelfLink                   getService                    getSource                     
getStatistics                 getSummary                    getText                       getTitle                      getTitleValue                 
getUpdated                    getVideoCategory              getVideoCommentFeedUrl        getVideoComplaintsLink        getVideoDescription           
getVideoDeveloperTags         getVideoDuration              getVideoGeoLocation           getVideoId                    getVideoRatingInfo            
getVideoRatingsLink           getVideoRecorded              getVideoResponsesLink         getVideoState                 getVideoTags                  
getVideoThumbnails            getVideoTitle                 getVideoViewCount             getVideoWatchPageUrl          getWhere                      
getXML                        isVideoEmbeddable             isVideoPrivate                lookupNamespace               registerAllNamespaces