I've never used pdo and i'm trying to get it to work with mysql. I have pdo installed and I'm now wondering how to enable pdo with mysql. I've read that it's possible with pecl, but i couldn't find how to do that. thanks in advance.

As far as I know there is no way to directly store an object in a database without a plugin using PHP/MySQL. You can store all of its constructors in a database and use that to build the object. Of course there are plugins that simplify the process.

Generally when I have an object that I need stored in a database I just create a table for it and create columns for all of the constructors and attributes. Then when I need to I build the object from the database entries (using setters for any attributes that were not in the constructor).