How to automatically logout after vendor register

-- HikaShop version -- : 2.3.3
-- HikaMarket version -- : 1.4.4
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.5.14-1

hi
How to i automatically logout user after vendor register and redirect to article id

vendors Registration options is automatic validation

i did add this code
$app = JFactory::getApplication();
$user = JFactory::getUser();
$user_id = $user->get('id');
$app->logout($user_id, array());
echo '<script type="text/javascript">
window.location = " www.google.com/ "
</script>'
?>

but i get this error :

Please complete the Address field

Please complete the Post field

Please complete the town field

Please complete the phone field

Warning: Creating default object from empty value in ../administrator/components/com_hikamarket/classes/vendor.php on line 476

do i need to check required fields before adding the code

Like this?
$missing = array();
foreach ($_POST as $key => $value) { if ($value == "") { array_push($missing, $key);}}
if (count($missing) > 0) {
echo "Required fields found empty: ";
foreach ($missing as $k => $v) { echo $v." ";}
} else {
unset($missing);
$app = JFactory::getApplication();
$user = JFactory::getUser();
$user_id = $user->get('id');
$app->logout($user_id, array());
echo '<script type="text/javascript">
window.location = " www.google.com/ "
</script>'
}

its ok now if you fill in all required fields
but if you do not fill in required fields this error

Warning: Invalid argument supplied for foreach() in
../administrator/components/com_hikashop/classes/field.php on line 642

if new user forget / miss any or all of this required fields
plg.hikamarket.vendor vendor_address_company Company
plg.hikamarket.vendor vendor_address_street Address
plg.hikamarket.vendor vendor_address_post_code Post code
plg.hikamarket.vendor vendor_address_city City
plg.hikamarket.vendor vendor_address_telephone Telephone

did test not to fill in Postcode and City field and Telephone get this error

Please complete the Postcode field
Please complete the City field
Please complete the Telephone field

Error during registration

Warning: Invalid argument supplied for foreach() in .../administrator/components/com_hikashop/classes/field.php on line 642

index.php/shop-reg (the vendor registration page start test)
this page opens when you click register index.php/shop-reg/vendor/register (error page)


Regards,