<?php

     $user = "domain\user";
     $pass = "password";
     $dn = "OU=...";

     $time = microtime();
     $time = explode(" ", $time);
     $time = $time[1] + $time[0];
     $start = $time;

     $ldap = $_GET['host'];
     $conn = ldap_connect($ldap) or die("Couldn't connect to AD!");
     ldap_set_option($conn, LDAP_OPT_PROTOCOL_VERSION, 3);
     $bind = ldap_bind($conn,$user,$pass) or die("can't bind");
     $attributes = array("displayname", "l");
     $filter = "(cn=*)";
     $result = ldap_search($conn, $dn, $filter, $attributes);
     $entries = ldap_get_entries($conn, $result);
     for ($i=0; $i<$entries["count"]; $i++)
    {
        echo $entries[$i]["displayname"]
             [0]."(".$entries[$i]["l"][0].")<br />";
    }
ldap_unbind($conn);
ldap_close($conn);


$time = microtime();
$time = explode(" ", $time);
$time = $time[1] + $time[0];
$finish = $time;
$totaltime = ($finish - $start);
printf ("This page took %f seconds to load.", $totaltime);