What potential issues could arise when integrating an RSS parser like MagpieRSS into a website using PHP?

One potential issue that could arise when integrating an RSS parser like MagpieRSS into a website using PHP is the risk of exposing sensitive information from the RSS feed. To solve this, it is important to sanitize and validate the data retrieved from the feed before displaying it on the website to prevent any security vulnerabilities. 

// Example of sanitizing and validating data retrieved from the RSS feed
require_once('rss_fetch.inc');

$url = 'https://example.com/feed.rss';
$rss = fetch_rss($url);

if ($rss) {
    foreach ($rss->items as $item) {
        $title = htmlspecialchars($item['title']);
        $description = htmlspecialchars($item['description']);
        
        // Display sanitized data on the website
        echo "<h2>{$title}</h2>";
        echo "<p>{$description}</p>";
    }
}

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