<?php
$target = "72.14.207.99"; // your target
$ports = array(21, 25, 79, 80); // [url]http://www.iss.net/security_center/advice/Exploits/Ports/default.htm[/url]
$timeout = 1; // ...timeout

function portScan($host, $port, $timeout=30) {
   $fp = @fsockopen($host, $port, $errno, $errstr, $timeout);
   if ($fp) {
      return True;
   } else {
      return False;
   }
}

ob_start();
foreach($ports as $port) {
   $scan=portScan($target, $port, $timeout);
   if($scan[0]) {
      echo "Success $target:$port<br />";
   } else {
      echo "Fail $target:$port<br />";
   }
   ob_flush();  // Used to send data right after instead of waiting for entire scan
   flush();  // See last comment.
}
?>