RSS XML show itunes:image url in PHP - php

Question

Hello I need some help getting the image URL of the itunes:image attribute from my XML rss feed. I can retrieve everything else in the array, but not 'mainimg'. The current code returns nothing for the image although it's there. Do you have any idea how I can do this, I'm looking for the HREF so I can place it inside 'img' tags.
<?php
$doc = new DOMDocument();
$doc->load('http://rss.acast.com/globalpillage');
$cnt=0;
foreach ($doc->getElementsByTagName('item') as $node) {
$itemRSS = array (
'maintitle' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue,
'enclosure' => $node->getElementsByTagName('enclosure')->item(0)->getAttribute('url'),
'mainimg' => $node->getElementsByTagName('image')->item(0)->getAttribute('url')/*This is what I'm trying to call the itunes:image attribute(HREF) with*/,
);
?>
<div class="showcontent">
<img src="<?php echo $itemRSS['image']; /*echo the itunes:image attribute(HREF)*/ ?>">
<h2><?php echo $itemRSS['title']; ?></h2>
<p><strong>Published</strong> <?php echo $itemRSS['date']; ?></p>
<audio controls>
<source src="<?php echo $itemRSS['enclosure']; ?>" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
</div>
<?php $cnt ++; } ?>

Answer 1

// Get namespace URI for prefix `itunes`
echo $ns = $s->lookupNamespaceURI('itunes');
// Get `image` tag from that namespace
echo $href = $node->getElementsByTagNameNS($ns, 'image')->item(0)->getAttribute('href');

Answer 2

If anyone stumbles upon this, I could not get the comment nor the answer to work. I think the comment should have $doc not $dom to mimic the example code, but that resulted in just the image for the podcast each time, not the "items". It looked like this:
echo $href = $doc->getElementsByTagNameNS('http://www.itunes.com/dtds/podcast-1.0.dtd', 'image')->item(0)->getAttribute('href');
But when I changed to $node in the loop, I received the correct image:
echo $href = $node->getElementsByTagNameNS('http://www.itunes.com/dtds/podcast-1.0.dtd', 'image')->item(0)->getAttribute('href');
Also, there are a few other typos I came across in the example code like storing $item['maintitle'] but echoing $item['title']
I could never get the accepted answer to work. In the end, this is what my code looked like this when I was scraping an Anchor podcast RSS feed:
<?php
$doc = new DOMDocument();
$doc->load('https://anchor.fm/s/xxxxxxx/podcast/rss');
foreach ($doc->getElementsByTagName('item') as $node) {
$itemRSS = array (
'title' => $node->getElementsByTagName('title')->item(0)->nodeValue,
'link' => $node->getElementsByTagName('link')->item(0)->nodeValue,
'date' => $node->getElementsByTagName('pubDate')->item(0)->nodeValue,
'enclosure' => $node->getElementsByTagName('enclosure')->item(0)->getAttribute('url'),
'mainimg' => $node->getElementsByTagNameNS('http://www.itunes.com/dtds/podcast-1.0.dtd', 'image')->item(0)->getAttribute('href')
);
?>
<div class="showcontent">
<img src="<?php echo $itemRSS['mainimg']; ?>">
<h2><?php echo $itemRSS['title']; ?></h2>
<p><strong>Published</strong> <?php echo $itemRSS['date']; ?></p>
<audio controls>
<source src="<?php echo $itemRSS['enclosure']; ?>" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
</div>
<?php } ?>