Re: passing $_POST variables to classes

On Tue, 31 Jul 2007 03:23:32 +0200, amygdala <noreply@xxxxxxxxxxx> wrote:

Hi all,

I'm starting this new project in which I'ld like to implement sort of a
design pattern I have seen being used in the CodeIgniter framework.

Basically, the site will examine the URI and based on the segments of the
URI it will fire up some controller class, for instance, say I have an inbox
in which end-users can view messages they got from other users, they'ld
start at:

http://www.somesite.com/inbox/view/

This will then call upon the function view in the class inbox:

class Inbox extends Controller
{
// ...
public function view()
{
// ...
}
// ...
}

Any trailing segments of the URI will be passed as supplement arguments to
the function.

Now, if $_POST variables are sent to some page and are needed by the called
upon function in the appropriate class, would it be bad practice to simply
extract those $_POST variables from the superglobal $_POST inside this
function? Preferably I would like to send the $_POST variables as arguments
to the function, but I'm not sure how to implement this correctly, nor am I
even completely sure as to why this would be better practice, other than
that the function will only accept predefined arguments.

What are your views on implementing such a 'pattern' (if you will). Would
you even suggest such an implementation, or am I bound to get into trouble
with proposed pattern?


There's nothing wrong with using $_POST directly. If however, you're writing an app that might get it's instructions another way (for instance the commandline, SOAP, instruction files), it might be handy to let a controller decide what kind of request it gets, and create a request object accordingly. When this is used in the code further one, it saves you having to write the entire interfaces for these 'channels' again, and assures that all requests are handled in the same manner. Offcourse, the response for all these channels is usually different, then again 'what kind of response do I want' i just part of the request offcourse. (Even when just talking HTTP GETS/POST there might be a difference between calls for entire HTML pages or for instance JSON objects).
--
Rik Wasmus
.

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