SQLite
Sqlite will create the database file if it does not exist.
$conn = &ADONewConnection('sqlite');
$conn->PConnect('c:\path\to\sqlite.db'); # sqlite will create if does not exist
Or dsn:
$dsn = 'sqlite://user:pwd@localhost/mydb?persist'; # persist is optional
$conn = ADONewConnection($dsn); # no need for Connect/PConnect