Get the source code from Github    -    or the bookmarklet

Result:

https://polandcasino.site/
Array
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    [cache-control] => private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
    [expires] => Thu, 01 Jan 1970 00:00:01 GMT
    [expect-ct] => max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    [report-to] => {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v3?s=AniInFUf1VsA0j6hpyOSfjFCAW%2Bt3EP7cxLaUCNgYMGFXEYA%2B520dg84y4PZWEyzAJMkqLTrcx9XoOPTliuCFZPWIciZmBaj%2FmnadvPmAvQXawQLMLM1lK556qN6qbaLHhxC4g%3D%3D"}],"group":"cf-nel","max_age":604800}
    [nel] => {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
    [vary] => Accept-Encoding
    [server] => cloudflare
    [cf-ray] => 73ac9e09f98c7881-VIE
    [alt-svc] => h3=":443"; ma=86400, h3-29=":443"; ma=86400
)
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    [content_type] => text/html; charset=UTF-8
    [http_code] => 503
    [header_size] => 1182
    [request_size] => 119
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.068301
    [namelookup_time] => 0.012322
    [connect_time] => 0.021994
    [pretransfer_time] => 0.047113
    [size_upload] => 0
    [size_download] => 7910
    [speed_download] => 116323
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0.067943
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 104.21.48.64
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 56598
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
)
<!DOCTYPE html>
<html lang="en-US">
<head>
    <title>Just a moment...</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=Edge" />
    <meta name="robots" content="noindex,nofollow" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <link href="/cdn-cgi/styles/cf-errors.css" rel="stylesheet" />
    <meta http-equiv="refresh" content="35">
<script>
    (function(){
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            cType: 'non-interactive',
            cNounce: '2966',
            cRay: '73ac9e09f98c7881',
            cHash: '7e457eb6b1adc0b',
            cUPMDTk: "\/?__cf_chl_tk=FgI5tHtTPILapf5te2iJuF7OZAhikPFkP80ysFZXq6M-1660510798-0-gaNycGzNBv0",
            cFPWv: 'g',
            cTTimeMs: '1000',
            cTplV: 3,
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        window._cf_chl_enter = function(){window._cf_chl_opt.p=1};
    })();
</script>

</head>
<body class="no-js">
    <div class="main-wrapper" role="main">
    <div class="main-content">
        <h1 class="zone-name-title h1">
            <img class="heading-favicon" src="/favicon.ico"
                 onerror="this.onerror=null;this.parentNode.removeChild(this)" />
            polandcasino.site
        </h1>
        <h2 class="h2" id="cf-challenge-running">
            Checking if the site connection is secure
        </h2>
        <noscript>
            <div id="cf-challenge-error-title">
                <div class="h2">
                    <span class="icon-wrapper">
                        <div class="heading-icon warning-icon"></div>
                    </span>
                    <span id="cf-challenge-error-text">
                        Enable JavaScript and cookies to continue
                    </span>
                </div>
            </div>
        </noscript>
        <div id="trk_jschal_js" style="display:none;background-image:url('/cdn-cgi/images/trace/jsch/nojs/transparent.gif?ray=73ac9e09f98c7881')"></div>
        <div id="cf-challenge-body-text" class="core-msg spacer">
            polandcasino.site needs to review the security of your connection before
            proceeding.
        </div>
        <form id="challenge-form" action="/?__cf_chl_f_tk=FgI5tHtTPILapf5te2iJuF7OZAhikPFkP80ysFZXq6M-1660510798-0-gaNycGzNBv0" method="POST" enctype="application/x-www-form-urlencoded">
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<script>
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    <div class="footer" role="contentinfo">
        <div class="footer-inner">
            <div class="clearfix diagnostic-wrapper">
                <div class="ray-id">Ray ID: <code>73ac9e09f98c7881</code></div>
            </div>
            <div class="text-center">
                Performance &amp; security by
                <a rel="noopener noreferrer" href="https://www.cloudflare.com?utm_source=challenge&utm_campaign=j" target="_blank">Cloudflare</a>
            </div>
        </div>
    </div>
</body>
</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://polandcasino.site/' (Status code 503) in /var/www/oscarotero.com/www/embed3/src/Embed.php:142 Stack trace: #0 /var/www/oscarotero.com/www/embed3/src/Embed.php(81): Embed\Embed::process() #1 /var/www/oscarotero.com/www/embed3/demo/index.php(216): Embed\Embed::create() #2 {main} thrown in /var/www/oscarotero.com/www/embed3/src/Embed.php on line 142