Question about Classes

Hello, all. I have a sort of theoretical/sort of dumb question about PHP classes, which I haven't really worked with and don't entirely understand the purpose of, so here goes: Say i want to handle the add or update or delete of an item to a MySQL db, and instead of having three functions (function addItem, function updateItem, function deleteItem), it seems I could: a) have one function (modifyItem) with some sort of attribute saying which type it is, and then if/else through to the appropriate type of operation based on this flag, i.e., modifyItem($array_of_data, 'update') chooses the update switch b) have a modifyItem class, with the three possible functions inside c) stick with my three original functions Is b) the sort of thing you might use a class for, or do I misunderstand? If not, what would be some "classic" uses of classes in our php/mysql world? (I've looked at the manual, php cookbook, etc., I'm just trying to get a very general sense of what sorts of situations are best handled by classes.) Thanks for any thoughts, Andrew