PHP: Instagram to RSS feed

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<?php
// Content type in header to xml.
header('Content-type: text/xml');
 
// Your instagram user, how many pages to pull from instagram.
$instagramUser = 'USER';
$limit = 3;
 
// Define variables.
$instagramJsonUrl = 'https://www.instagram.com/' . $instagramUser . '/?__a=1';
$has_next_page = 1;
$end_cursor = null;
$count = 1;
$instagram = null;
 
// Start of xml
echo '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel>' .
  '<title>Instagram feed</title>' .
  '<link>https://browse-tutorials.com</link>' .
  '<description>PHP: Instagram to RSS feed</description>' .
  '<atom:link href="https://browse-tutorials.com/rss.xml" rel="self" type="application/rss+xml" />';
 
while ((int) $has_next_page === 1 and $count <= $limit) {
  // Append page id when not first page.
  $url = $instagramJsonUrl;
  if ($end_cursor !== null) {
    $url .= '&max_id=' . $end_cursor;
  }
 
  // Instagram feed download and decode.
  $instagram = json_decode(file_get_contents($url), true);
 
  // Save variables for while loop.
  $has_next_page = $instagram['user']['media']['page_info']['has_next_page'];
  $end_cursor = $instagram['user']['media']['page_info']['end_cursor'];
 
  // Print current items.
  foreach ($instagram['user']['media']['nodes'] as $item) {
    echo '<item>'.
      '<title>' . $item['id'] . '</title>' .
      '<link>https://www.instagram.com/p/' . $item['code'] . '</link>' .
      '<description><![CDATA[' . $item['caption'] . ']]></description>' .
      '<pubDate>' . date(DATE_RSS, $item['date']) . '</pubDate>' .
      '<guid>' . $item['id'] . '</guid>' .
      '<enclosure url="' . $item['thumbnail_src'] . '" length="" type="image/jpeg"/>' .
      '</item>';
  }
 
  // Increase counter for limit.
  ++$count;
}
 
echo '</channel></rss>';
 
Programming Language: PHP