I always name things according to what I'm doing.

$dbname might be for the name in the database. $dbpass for password. $dbipddr logging of ip address. $dbdark might be a setting for light or dark theme.

In the databasae, it's just named as Name, Pass, IPAddr, DarkTheme or whatever. I've very rarely ever had to change names. But before I even start a project, I outline not only what the project is going to do, but how the database will look and function as well.