php - Loose coupling with data source -

first of sorry not able provide details , question might sound general.

i working on small project requirement of project bit wired. have make data source switchable. if using database data source in future might able use web service or files.

i don't have clue on how implement models can switch data source without making major changes application.

is there design pattern or design practices can use deal situation?

i planning on using zend framework.

thanks in advance.

take @ daos (data access object). it's existing in j2ee world simple, thin , usefull.

first define interface whatever function need:

<?php interface daointerface {     public function insert($object);     public function remove($object);     public function create($object); } 

then create concrete implementation of it. implementation exchangeable dependecy injection (di). can have several different ways of storing data now. you'll use interface + di.

one interface ->multiple differen implementations / ways of stroing data. typically 1 dao = 1 database object / table.