CF Resolver

<?php
// Cloudflare IP resolver API by Down from HF(ajones)

function is_ipv4($ip)
{
	return filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) ? $ip : '(Null)';
}

$me = $_SERVER['REMOTE_ADDR'];
$url = $_GET['url'];
$headers = get_headers($url, 1);
$server = $headers['Server'];
$key = array('aSd0Rla23-OWNER');
$key_count = count($key);
$sdom = array('cpanel.', 'ftp.', 'mail.', 'webmail.', 'direct.', 'direct-connect.', 'record.', 'ssl.', 'dns.', 'help.', 'blog.', 'forum.');

if(!isset($url))
{
	die("\n[Notice] Usage: api_cf.php?url=http://example.tld&api_key=api_key_here");
}
if(!isset($key_count))
{
	die("Key not set");
}
$gKey = $_GET['api_key'];
if(!in_array($gKey, $key))
{
	die("Key not found in list");
}
// asumes true
if(preg_match('/^(https?):\/\/(w{3}|w3)\./i', $url, $matches))
{
	if($mathces[2] != 'www')
	{
	$url = preg_replace('/^(https?):\/\//', '', $url);
	}
	else
	{
	$url = explode($matches[0], $url);
    $url = $url[1];
	}
}
if(is_array($server))
	$server = $server[0];

if(preg_match('/cloudflare/i', $server))
{
	echo "\n[Notice] CloudFlare detected: ".$server."\n";
}
else
{
	echo "\n[Notice] CloudFlare not detected.";
}
echo "[Scanner] IP: " . is_ipv4(gethostbyname($url)) . "\n\n";
echo "[Scanner] Searching for more IP Addresses\n\n";

for ($x = 0; $x < $count; $x++)
{
	$site = $sdom[$x] . $url;
	$ip = is_ipv4(gethostbyname($site));

	echo "Trying ".$site.": ".$ip."\n";
}
echo "\n[Notice] Finished.";
?>