Verificar header (erro http1.0,htt1.1)

Boas

Peguei um código para verificar se o site (url) está activo.

Mas por vezes o resultado é errado, quando o cabeçalho é em http 1.0(falso morto) se for 1.1 funciona bem.

uma ajudinha ai?

function page_exists($url){
 $parts=parse_url($url);
 if(!$parts) return false; /* the URL was seriously wrong */
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 /* set the user agent - might help, doesn't hurt */
 curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');
 curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
 /* try to follow redirects */
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 curl_setopt($ch, CURLOPT_ENCODING, "");
 /* timeout after the specified number of seconds. assuming that this script runs
 on a server, 20 seconds should be plenty of time to verify a valid URL. */
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
 curl_setopt($ch, CURLOPT_TIMEOUT, 20);
 /* don't download the page, just the header (much faster in this case) */
 curl_setopt($ch, CURLOPT_NOBODY, true);
 curl_setopt($ch, CURLOPT_HEADER, true);
 /* handle HTTPS links */
 if($parts['scheme']=='https'){
 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 }
 curl_exec ($ch);
 $intReturnCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 curl_close ($ch);
 if ($intReturnCode != 200 && $intReturnCode != 301 && $intReturnCode != 302 && $intReturnCode != 304) {
 return '<font color="red"> -Morto</font>';
}
 else {
 return '<font color="green"> -OK</font>';
}
}

$query = mysql_query("SELECT * FROM sites");

while($row = mysql_fetch_assoc($query)){

<td><a href="http://'.$row['url'].'" target="_blank">'.$row['url'].page_exists($row['url']).'</a></td>
}