For example ,The guest at table 1 ordered a cup of coffee through the webpage, so how do I send the table number and coffee information to the kitchen webpage?
At the same time there are other table guests are also ordering.
If they all use the same page, how should I pass parameters?
I would say —> trough database.
On site-A you write to your DATABASE.
On site-B you read from your DATABASE.
That’s it!
Your DATABASE consists of for example:
- 20-tables (20 rows)
- and has several columns (numbered)
- every number stands for a menu in your store/restaurant.
- or the columns are directly named by menu-items.
- below the headlines you have then numbers which represets the amount of ordered menu-items (coffee).
This is just an example. There are surely also other ways how to do it.
Everything depends on the structure of your database!
Good luck! 
Thank you
I got it