php - Confusion- Should I use CodeIgniter or something else for below case -

as have never develop web-app scrach. want know that:

background:

i have develop web-app database on other machine[say server], , every communication database has done using soap web service[database on server]. i'm looking forward use codeigniter framework achieve this.

as codeigniter mvc based, has divided

module - can storage

view - can output

controller - can communicator between view , module

confusion: can use condigniter app database remote.

as have seen tutorials , examples, of based on local database.

so can guide me, possible have communication database in same framework.

as have followed tutorials, flow like(for local database)

request: view -> controller -> module

response: module -> controller -> view

so please tell me,how in codeigniter framework? possible? can done? i'm confused,how run app without local database/how can communicate soap services using model class. or do? or should move core php,if not possible in codeigniter framework?? please me out. lot!

imp update:**

communication database has done web service(soap)

typically, codeigniter app has following setting in database configuration file:

$db['default']['hostname'] = "localhost"; 

instead of localhost, should use whatever have set connect external database.

have at: http://ellislab.com/codeigniter/user-guide/database/configuration.html

note: should not asking if possible or not ci. ci framework building applications , should able want, don't think can or can't do, think if it's right tool job architectural standpoint.