PEAR::Cache/Cache_Function

I'm trying to use the cache_function class and I've run into a brick wall and I'm hoping someone can help. I've looked over the code and I just can't figure it out. What if you need to call a function that contains multiple (mixed) parameters? Here's a simplified example of what I'm trying to do: <? $cache = new Cache_Function( 'file', array( 'cache_dir' => './cache' )); $cacheID = $cache->generateID( 'test_id' ); if( $data = $cache->get( $cacheID )) { echo "Cache hit:<br>\n"; echo $data; } else { $stringVar = "Test"; $parameters = array( 'query' => 'select * from links' ); $myClass = new myClass(); $result = $cache->call( 'myClass->myFunc', array( 'stringVar', 'parameters' )); ?> But that's not working. How can I pass multiple arguments to myClass->myFunc() via cache->call()? Any help would be greatly appreciated!! Also, if someone could point the direction to some really good (and hopefully comprehensive) tutorials on using PEAR's Cache, I'd very much appreciate that as well!! Also, slight tangent - one minor point. I would think that the Cache container (Function, File, DB, etc) object's methods, especially the constructor, should conform to the definition (signature?) of the Cache class methods. Unless I'm missing some- thing or am misunderstanding OOP (and interfaces), I should just be able to instantiate a Cache object, use the container param to pass, say, 'function' and access the function container class' methods as such: $cache->container->whatever(); But the way some of the container classes are written, they aren't using the same number of parameters. So if I wanted to overrride, say, the container options parameter (to specify, say, a different cache directory) I would have to instantiate the container class and I couldn't go through the Cache base class. I don't know if that was intentional or not but I would think that all I would need to include/instantate would be the Cache class to Cache anything (because the member variable container holds the actual instantiation of the container class) and not have to worry about instantiating all these differenct classes to Cache whatever I need to. This is just an observation I made as I was reading through the code. Again, I may be totally mistaken about this... Chris