I have software . where user enter his whats app number for booking. I am looking for Code / Script When user enter His Whats App number and we can verify from WhatsApp server either the contact number is registered on whats-app on not ? i have attached image Where you can see my booking form user have to enter his whats app number. i need to verify the contact number of user either registered on whats app or not.
If Whats app is allowing in business api or simple what will be the source code ?