server up checker

[tonymontana]

i found this script somewhere

<?
function check_irc($ip,$port) {
$fp = fsockopen ($ip, $port, $errno, $errstr, 30);
if (!$fp) {
return false;
}
else {
return true;
}
}
check_irc("irc.quakenet.org","6667");
?>

but how do i get it to work with a dns & port? (or with just an ip and port) i tried to replace irc.quakenet.org with my dns and port.. but tells me it's offline while it's not. so i guess it doesn't seem to work with no-irc dnsses?

can anyone help me out?

[Anon]

A daemon has to be running on the specific port you entered in the script (fsockopen is like telnet: it tries to connect to a port).

[tonymontana]

the point is, i have tried with pinging the server but, pinging is not the right solution. it needs to scan several ports before it displays the on- or off-line message. One ping is not suitable because when the server lags or in other way doesn't pong the message will display offline while it isn't.

this is how i did it:

<?php

$portarray=array(8888,7777,6666,9999);

if(!$port) {

for($i=0;$i<count($portarray) AND $status!='online';$i++) {
$sock = fsockopen($host, $portarray[$i], &$num, &$error, 1);
if(!$sock) {
$status = "offline";
@fclose ($sock);
} else {
$status = "online";
@fclose ($sock);
}
}

} else {

$sock = fsockopen($host, $port, &$num, &$error, 100); 
if(!$sock) { 
    $status = "offline"; 
    @fclose ($sock); 
} else { 
    $status = "online"; 
    @fclose ($sock); 
} 

}

if($status=="online") {
echo "online";

} elseif($status=="offline") {
echo "offline";

}
?>

the page posts the dns and port to this file and generates the output, but as you can see.. it displays offline when the server doesn't respond or gives an error. i need it to scan all ports several times before.