Add Event on Google Calendar in PHP

I have a booking site and it has a booking form with appointment date and some other information. Now I'd like whenever my customer make a booking through the form, all information including customer's info, booking date and so on will be added automatically to my Google Calendar without log-in screen to Google account. I am not sure but I think we can provide the Google account and password inline code, so codes will use that information to log-in automatically and add event (with data) to Google Calendar. So I can track all my customer's appointment so quickly. PS: I already created my own Google account. I just want code in PHP, I don't care about interface. ## Deliverables