In PHP, using Redis, developers often need to retrieve the current database number they are connected with. This is particularly useful when working with multiple databases in Redis and to ensure that the correct operations are being performed on the intended database.
Here's an example of how to get the current database number using the
In this example, the
select() method is used to switch to the desired database and the
getDbNum() method is used to retrieve the currently selected database number.
Not checking the current database before conducting operations might lead to unintended modifications on the wrong database.
Q: What if I try to select a database that doesn't exist? A: Redis will create it for you. Redis configuration defaults to 16 databases (numbered from 0 to 15), but you can increase this in your redis.conf file.