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Result:

http://siperizinan.cf/a
Array
(
    [connection] => Keep-Alive
    [cache-control] => private, no-cache, no-store, must-revalidate, max-age=0
    [pragma] => no-cache
    [content-type] => text/html
    [content-length] => 708
    [date] => Sun, 03 Jul 2022 02:07:26 GMT
)
Array
(
    [url] => http://siperizinan.cf/a
    [content_type] => text/html
    [http_code] => 404
    [header_size] => 223
    [request_size] => 117
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.305963
    [namelookup_time] => 0.125101
    [connect_time] => 0.215457
    [pretransfer_time] => 0.215552
    [size_upload] => 0
    [size_download] => 708
    [speed_download] => 2321
    [speed_upload] => 0
    [download_content_length] => 708
    [upload_content_length] => -1
    [starttransfer_time] => 0.305782
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 54.39.115.182
    [certinfo] => Array
        (
        )

    [primary_port] => 80
    [local_ip] => 78.47.42.177
    [local_port] => 52448
    [http_version] => 2
    [protocol] => 1
    [ssl_verifyresult] => 0
    [scheme] => HTTP
)
<!DOCTYPE html>
<html style="height:100%">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no" />
<title> 404 Not Found
</title></head>
<body style="color: #444; margin:0;font: normal 14px/20px Arial, Helvetica, sans-serif; height:100%; background-color: #fff;">
<div style="height:auto; min-height:100%; ">     <div style="text-align: center; width:800px; margin-left: -400px; position:absolute; top: 30%; left:50%;">
        <h1 style="margin:0; font-size:150px; line-height:150px; font-weight:bold;">404</h1>
<h2 style="margin-top:20px;font-size: 30px;">Not Found
</h2>
<p>The resource requested could not be found on this server!</p>
</div></div></body></html>

Fatal error: Uncaught Embed\Exceptions\InvalidUrlException: Invalid url 'http://siperizinan.cf/a' (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