Ldap query from ltm

Okay, let's say you have a PHP web server that can make LDAP calls based on a parameter in the query string (ex. "?find=user"). Example:

set_time_limit(30);
error_reporting(E_ALL);
ini_set('error_reporting', E_ALL);
ini_set('display_errors',1);

$ldapserver = '10.80.0.200';
$ldapuser      = 'CN=Administrator,CN=users,DC=mydomain,DC=com'; 
$ldappass     = 'password';
$ldaptree    = "CN=Users,DC=mydomain,DC=com";

if(!isset($_REQUEST["find"])) {
    echo "No query parameter";
} else {
    // query string parameter to use in search
    $findthis = $_REQUEST["find"];

    // what value(s) to return
    $justthese = array("userPrincipalName");

    $ldapconn = ldap_connect($ldapserver) or die("Could not connect to LDAP server.");

    if($ldapconn) {
        $ldapbind = ldap_bind($ldapconn, $ldapuser, $ldappass) or die ("Error trying to bind: ".ldap_error($ldapconn));

        if ($ldapbind) {
            $result = ldap_search($ldapconn,$ldaptree, "(sAMAccountName=$findthis)", $justthese) or die ("Error in search query: ".ldap_error($ldapconn));
            $data = ldap_get_entries($ldapconn, $result);

            if($data["count"] > 0) {
                echo $data[0]["userprincipalname"][0];
            } else {
                echo "No data";
            }

        } else {
            echo "LDAP bind failed...";
        }

    }
    ldap_close($ldapconn);
}

** Ref: http://www.php.net/manual/en/function.ldap-search.php