Проверьте, если плейлист YouTube пуст

Я использовал код в этом коде и сделал некоторые изменения:

<div class="content-wrapper">

<?php
//define playlist ID
$playlistID = '8BCDD04DE8F771B2';
//set feed URL
$feedURL = 'https://gdata.youtube.com/feeds/api/playlists/'.$playlistID.'?v=2';
//turn feed into simpleXML object
$sxml = simplexml_load_file($feedURL);
/*
//If simplexml_load_file() isn't supported by your server,
//you can alternatively use PHP cURL to parse through the XML
function load_file_from_url($url) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_REFERER, 'http://www.yourdomain.com');
$str = curl_exec($curl);
curl_close($curl);
return $str;
}
function load_xml_from_url($url) {
return simplexml_load_string(load_file_from_url($url));
}
$sxml = load_xml_from_url($feedURL);
*/
?>

<?php foreach($sxml -> entry as $entry) : ?>

<?php
//get author
$author = $entry->author->name;
//get namespaces in entry node
$namespaces = $entry->getNameSpaces(true);
//get children nodes in media namespace
$media = $entry->children($namespaces['media']);
//get title
$title = $media->group->title;
//get description
$description = $media->group->description;
//get video player URL
$player_attrs = $media->group->player->attributes();
$player_url = $player_attrs['url'];
//get video thumbnail
$thumb_attrs = $media->group->thumbnail[0]->attributes();
//get children nodes of yt namespace in media namespace
$yt = $media->children($namespaces['yt']);
//get duration
$duration_attrs = $yt->duration->attributes();
$length = floor($duration_attrs['seconds'] / 60).':'.$duration_attrs['seconds'] % 60;
//get children nodes of yt namespace in entry
$yt = $entry->children($namespaces['yt']);
//get view count
$stats_attrs = $yt->statistics->attributes();
$viewCount = $stats_attrs['viewCount'];
//get children nodes of gd namespace
$gd = $entry->children($namespaces['gd']);
//if rating exists
if ($gd->rating) {
//get and set rating
$attrs = $gd->rating->attributes();
$rating = $attrs['average'];
} else {
//otherwise set rating to 0
$rating = 0;
}
//get video link
$link = $entry->link[0]->attributes();
$embedLink = $link['href'];
//use video link to format embed link
$embedLink = str_replace("&feature=youtube_gdata", "", $embedLink);
$embedLink = str_replace("/watch?v=", "/embed/", $embedLink);
?>

<div class="post-wrapper">

<iframe width="400" height="315" src="<?= $embedLink; ?>" frameborder="0" allowfullscreen></iframe>

<h2><?= $title; ?></h2>

<p><strong>Description</strong>
<br /><?= $description; ?></p>

<p><strong>Author</strong>
<br /><?= $author; ?></p>

<p><strong>Length</strong>
<br /><?= $length; ?></p>

<p><strong>Views</strong>
<br /><?= $viewCount; ?></p>

<p><strong>Thumbnail</strong>
<br /><img src="<?= $thumb_attrs; ?>" alt="Video Thumbnail" /></p>

</div>

<?php endforeach; ?>

</div>