$dbName = "myDatabase"; $pdo = new PDO("mysql:host=localhost;dbname=".$dbName, "username", "password");
use Illuminate\Support\Facades\DB; DB::setDbName('myDatabase'); $results = DB::select('select * from users');From the above examples, we can determine that the setDbName method belongs to the database library package, which is responsible for managing database connections and maintaining connections with databases.