Get the source code from Github    -    or the bookmarklet

Result:

https://slgame.bookmark.com/
Array
(
    [date] => Mon, 27 Jun 2022 14:09:33 GMT
    [content-type] => text/html
    [content-length] => 150
    [connection] => keep-alive
)
Array
(
    [url] => https://slgame.bookmark.com/
    [content_type] => text/html
    [http_code] => 404
    [header_size] => 133
    [request_size] => 121
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.741582
    [namelookup_time] => 0.028374
    [connect_time] => 0.187668
    [pretransfer_time] => 0.574758
    [size_upload] => 0
    [size_download] => 150
    [speed_download] => 202
    [speed_upload] => 0
    [download_content_length] => 150
    [upload_content_length] => -1
    [starttransfer_time] => 0.741449
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 35.165.150.162
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 78.47.42.177
    [local_port] => 39098
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => HTTPS
)
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>openresty</center>
</body>
</html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'https://slgame.bookmark.com/' (Status code 404) 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