i try this in Eclipse(3.3) PDT , but i think that this is in Zend Studio too

// getting a Zend_Cache_Core object $cache = Zend_Cache::factory('Core', 'File', $frontendOptions, $backendOptions);

but now i cant get no intelligence for $cache, due Zend_Cache::factory says in comments * @return Zend_Cache_Frontend

but class named Zend_Cache_Frontend hasn't exist so IDE don't know that too.

maybe is better to use something like this, due all frontend, backend classes extends or interface those:

• @return Zend_Cache_Core|Zend_Cache_Backend|Zend_Cache_Backend_Interface

and then IDE gives you all those classes methods with comments where they belong - this is better than nothing