Hai cercato la traduzione di selectdb da Inglese a Russo

$db = $mc -> selectdb ( 'test' );
$db = $mc -> selectdb ( 'test' );

$list = $conn -> selectdb ( $dbname )-> getcollectionnames ();
$a -> append (array( 'home' => 'china' , 'work' => 'developer' ));

$gridfs = $m -> selectdb ( 'test' )-> getgridfs ();
$gridfs = $m -> selectdb ( 'test' )-> getgridfs ();

$collection = $m -> selectdb ( "foo" )-> selectcollection ( "bar" );
$collection = $m -> selectdb ( "foo" )-> selectcollection ( "bar" );