CloudFlare e-mail obfuscator cracker in PHP

deobfmail.php

<?php
$doc = new \DOMDocument();
@$doc->loadHTMLFile($argv[1] ?? "https://baraja.cz/zivotopis");
$xpath = new \DOMXPath($doc);

function r($e, $t) {
    return hexdec(substr($e, $t, 2));
}
function n($n, $c) {
        $o = "";
    for ($a = r($n, $c), $i = $c + 2; $i < strlen($n); $i += 2) {
        $l = r($n, $i) ^ $a;
        $o .= chr($l);
    }
    return $o;
}

$els = $xpath->query("//*[@data-cfemail]");
foreach ($els as $el) {
        $attr = $el->parentNode->getAttribute("href");
        $attr = parse_url($attr, PHP_URL_FRAGMENT);

        echo n($attr, 0) . "\n";
}