SSRF ideas?

remote.php

<?php

$url = $_GET['url'];
$xml = @file_get_contents($url);
$ret = [];
if ($xml) {
    $doc = new DOMDocument();
    libxml_use_internal_errors(true);
    if ($doc->loadHTML($xml)) {

        $title = $doc->getElementsByTagName('title');
        foreach ($title as $key => $value) {
            $ret['title'] = $value->nodeValue;
        }

        $meta = $doc->getElementsByTagName('meta');
        foreach ($meta as $key => $value) {
            $property = $value->getAttribute('property');
            if ($property == 'og:image') {
                $ret['image'] = $value->getAttribute('content');
                break;
            }
        }
    }
} else {
    $ret['error'] = "could not parse url $url";
}
echo json_encode($ret);