Checking if domain exists

[nicdp]

How can I write a script to check if a domain name exist?... to get back TRUE if domainname.ext exists and is active and to get back FALSE if domainname.ext is not registered or not active?

[sidney]

$check=@fsockopen($Domain, 80, $errno, $errstr, 20)) 

if (!$check)
{
// false;
}                

else 
{
//true;
}
 

whjere domain is domain name
80 port number
and 20 time out
and @ suppresses any error displays

[nicdp]

<?php
$subject = "TEST";
$headers  = "MIME-Version: 1.0\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
$headers .= "From: TEST <[e-mail]>\r\n";
$message = "TEST";

$domain = "http://www.ciaociaociao.com";

$check=@fsockopen($domain, 80, $errno, $errstr, 20)) 

if (!$check)
{
echo "OOPS!!!";
}                

else 
{
mail('[e-mail]', $subject, $message, $headers);
}

?>

I tried this script but I get back a blank page: what's wrong? I also tried also putting "www.ciaociaociao.com" "ciaociaociao.com" as domain...

[sidney]

slight mistake in my previous example the below should work

$domain = "ciaociaociao.com"; 

$check=@fsockopen($domain, 80, $errno, $errstr, 20);  

if (!$check) 
{ 
echo "OOPS!!!"; 
}                 

else  

{ 
mail('[e-mail]', $subject, $message, $headers);
echo"success!!"; 
}