Another method for checking whether a URL exists

/* Brendan Warkentin  */
 
/* urlexists($url, $port = 80, $codes = array(200), $ssl = false)
 *
 * @Description:
 * Determine whether a url really exists.
 *
 * @Parameters:
 * $url:string - The fully-qualified url to check.
 * $port:int - The port to connect to.
 * $codes:array - The return codes to look for.
 * $ssl:bool - Whether we should use an encrypted connection.
 *
 * @Return:
 * Bool. True if the url exists, false otherwise.
 *
 * @Misc
 * By default this only checks for a return code of 200(OK). Some sites
 * do redirecting, and usually return 302. If you would like it to check
 * that you will have to manually specify the codes to check.
 */
function urlexists($url, $port = 80, $codes = array(200), $ssl = false) {
    $host = parse_url($url, PHP_URL_HOST);
    $path = parse_url($url, PHP_URL_PATH);
    $path = (strstr($path, "/") === 0 ? $path : "/");
    $req = sprintf("GET %s HTTP/1.0rnHost: %srnrn", $path, $host);
    $sock = false;
    $found = false;
 
    if ($ssl)
        $sock = fsockopen("ssl://".$host, $port);
    else
        $sock = fsockopen($host, $port);
 
    if ($sock != false) {
        fputs($sock, $req);
        $ret = fgets($sock);
        fclose($sock);
 
        foreach ($codes as $i)
            if (strstr($ret, (string) $i) !== false)
                $found = true;
        return $found;
    }
    return false;
}