Re: is_a() vs. instanceof

I agree, that's the exact behavior I would like as well and what most people would expect. Al On Wed, 2004-08-11 at 23:52 -0400, Hans Lellelid wrote: > Alan Knowles wrote: > > > I think he's referening to something like this (which is common in pear): > > > > $x = $someobj->somemethod(); > > if ($x instanceOf PEAR_Error) { > > ....... > > } > > > > while that code is redundant in the case of exceptions, it is still a > > valid situation.. that $x may be a valid return, and PEAR_Error was > > never loaded.. > > > Yup, that's exactly what I'm talking about. > > I want to be able to do this: > > if ($db instanceof DBPostgres) { > /// do something funky specific to Postgres > } > > If My DB adapter is DBMySQL, I don't want to load the DBPostgres adapter > just so I can test whether my object is of that type ... > > and checking first whether class_exists('DBPostgres') just seems kinda > kludgy & straying from the "problem domain" ... especially since $db > instanceof DBPostgres would *always* be false if DBPostgres isn't loaded. > > Hans >