This is an update to <i>wtfo at technocraft dot com</i> (23-May-2002 03:40)... This function allows additional (optional) parameters. The prev function listed, failed to close the ldap connection after successful authenication.

<?php
function checkNTuser($username,$password,$DomainName="myDomain",
                      $ldap_server="ldap://PDC.example.net"){//v0.9
// returns true when user/pass enable bind to LDAP (Windows 2k).
    $auth_user=$username."@".$DomainName;
    #echo $auth_user."->";
    if($connect=@ldap_connect($ldap_server)){
        #echo "connection ($ldap_server): ";
        if($bind=@ldap_bind($connect, $auth_user, $password)){
            #echo "true <BR>";
            @ldap_close($connect);
            return(true);
        }//if bound to ldap
    }//if connected to ldap
    #echo "failed <BR>";
    @ldap_close($connect);
    return(false);
}//end function checkNTuser
?>