In PHP radius ISP can set there default configuration Like ISP information, ISP logo, set Currency, Billing Title, Billing Terms, Billing TAX. Portal Setting etc.
to open an ISP Portal Configuration on sidebar > Config Admin Config option.that will display different tabs on a page.
Three Payment Gateway Available.
Payment Gateway Show On Client Portal For Client recharge by its self.
at a time anyone payment gateway display on client portal as you enable on admin config on payment gateway option.
On sidebar menu click on Config > Admin Config option.
Click on the Payment Gateway tab.
It will show you Three Different Payment Gateway tabs PAYUMONEY, ATOM, ONEPAY.
Now Fill a payment Gateway configuration information as you want like Merchant ID, Signature, Key.
Click on Enable button which you want to show on the client portal