结帐页面的付款方式标签中的Opencart邮政编码/城市

How can i post data of shipping city or postcode in payment method tab in Opencart version 2.1.0.2

I want to restrict COD to certain cities.Can any one help me out.

create custom table to store available post code. create text box for product list page and create button check available use ajax to check available .

First disable the add to cart button after check ajax is successful enable add to cat button.