whois basico con PHP

whois.php

<? 
$domains = array('home.pl', 'w3c.org'); 

function creation_date($domain) { 
    $lines = explode("n", `whois $domain`); 
    foreach($lines as $line) { 
        if(strpos(strtolower($line), 'created') !== false) { 
            return $line; 
        } 
    } 

    return false; 
} 

foreach($domains as $d) { 
    echo creation_date($d) . "n"; 
} 

?>