Question about cookies and db?

Question

PHP

There are cookies:
id
hash
We need to take the id from the cookies and display the user login with this id from the database and display it here:
$username =
Please help c:

Answer 1

You can read cookies in php in this way
$_COOKIE["name"] - where name is the name of the cookie .
You make a query to the database like
"SELECT id, username FROM users WHERE id = " .$_COOKIE["id"];