Duo Security Two factor authentication web SDK php

If you are not know Duo Security two factor authentication please do not bid. I have a login script and need to add Duo factor authentication. This I have so far on the page after login and it is not working Need some help. If you have done this before it should take a few minutes. <?php require_once('[login to view URL]'); $DuoAuthCookieName = 'duo_auth_cookie'; $DuoSecAuthCookieName = 'duo_secure_auth_cookie'; $DuoDebug = false; $DuoPing = '/auth/v2/ping'; function duo_sign_request($user, $redirect) { $ikey = ('xxxxxxx'); $skey = ('xxxxxxxx'); $host = ('xxxxxxx'); $akey = ('xxxxxxx'); $username = $user->user_login; $duo_time = duo_get_time(); $request_sig = Duo::signRequest($ikey, $skey, $akey, $username, $duo_time); duo_debug_log("Displaying iFrame. Username: $username cookie domain: " . COOKIE_DOMAIN . " redirect_to_url: $redirect ikey: $ikey host: $host duo_time: $duo_time"); duo_debug_log("Duo request signature: $request_sig"); } ?> <script src="[login to view URL]"></script> <script> [login to view URL]({ 'host': '[login to view URL]', 'post_action': '[login to view URL]', 'sig_request':<?php echo "'" . $request_sig . "'"; ?> }); </script> <iframe id="duo_iframe" width="620" height="330" frameborder="0"></iframe>