Check status of TCP port with PHP: status, check, php, port, tcp

Check status of TCP port with PHP

Below is some neglected code for checking TCP ports with PHP.
http://www.schwebdesigns.com/serverstatus/
http://www.schwebdesigns.com/serverstatus/status.zip

However I keep getting the following errors.
Can someone who has experience with fsocketopen function take a look at this?
I'm not sure why it cannot modify the header info, that's a new one to me.

Notice: Undefined variable: link in e:\inetpub\www\intranet\status\status.php on line 16
Notice: Undefined offset: 1 in e:\inetpub\www\intranet\status\status.php on line 16
Warning: Cannot modify header information - headers already sent by (output started at e:\inetpub\www\intranet\status\status.php:16) in e:\inetpub\www\intranet\status\status.php on line 23

PS if anyone knows of another PHP script that can monitor TCP ports and is reliable, please let me know.
This is the only script I came across after hours of looking.

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Here's a completely modified version that will do what you want.

Just save is as status.php in the same directory as the original and update the server address specific setup lines as usual.
------------------
BEGIN status.php
------------------
<?php
//
// Modified Web Server Status v 1.2, Copyright 2002 By Ryan Schwiebert, visit http://www.schwebdesigns.com/
// See http://www.experts-exchange.com/Web/Web_Languages/PHP/Q_20554037.html
//

//
// BEGIN SETTINGS
//
//Please change to your server specifications
//

$live = "http://tech_01/status/live.gif";
$dead = "http://tech_01/status/dead.gif";
$defaultPort = 80;
$separator = ':';
$waitTime = 5;

// END SETTINGS

$link = $HTTP_GET_VARS['link'];

if($separator == ':'){
if(strstr($link, $separator)){
if(substr($link, 0, 6) == 'http://'){
list($URI, $port) = explode($separator, substr($link, 6, 0));
}
else{
list($URI, $port) = explode($separator, $link);
}
}
else{
$URI = str_replace('http://', '', $link);
$port = $defaultPort;
}
}
else{
list($URI, $port) = explode($separator, $link);
}

if(empty($port)){
$port = 80;
}

//Test the server connection
$checkURI = @fsockopen(server($URI), $port, $errno, $errstr, $waitTime);

if($checkURI){
header("Location: $live");
// echo 'good';
}
else{
header("Location: $dead");
// echo 'dead';
}
function server($addr){
if(strstr($addr,"/"))
$addr = substr($addr, 0, strpos($addr, "/"));
return $addr;
}
?>
------------------
END status.php
------------------

I'd also suggest that you award more points for a thread where you request someone to write a script for you.

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Check status of TCP port with PHP

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status

check

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PHP Scripting Language

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