php ile favicon adresi almak

<?
function ikon($adres) {
 $site=$adres;
 $kaynak=file_get_contents($site);
$kaynak=strtolower($kaynak);
  if (strstr($kaynak,"ico")) {
    $regex='#<link href="(.*?)"#i';
    preg_match($regex,$kaynak,$ico);
    $ico=$ico[1];
    $array_i=array("\"","'"," ");
    $array_z=array("","","");
    $ico=str_replace($array_i,$array_z,$ico);
	$site=explode("/", $site);
    $site=$site[2];
    $ico=$site."/".$ico;
  } else {
    $ico="yok";
  }
  return $ico;
}
$favicon=ikon("http://www.nacizanebilgi.com");
echo $favicon;
?>

#kullanimi
$favicon=ikon("http://www.nacizanebilgi.com");
echo $favicon;