How to display RSS Feeds using PHP?

<?php

$html = "";

$url = "https://www.kdnuggets.com/feed";

//https://www.sciencedaily.com/rss/matter_energy/engineering.xml

$xml = simplexml_load_file($url);

//Displaying latest 10 Feeds

for($i = 0; $i < 10; $i++){

    $title = $xml->channel->item[$i]->title;

    $link = $xml->channel->item[$i]->link;

    $description = $xml->channel->item[$i]->description;

    $pubDate = $xml->channel->item[$i]->pubDate;    

    $html .= "<a href='$link'><h3>$title</h3></a>";

    $html .= "$description";

    $html .= "<br />$pubDate<hr />";

}

echo $html;

?>