Is it posible to have a 3 tier design with PHP?

kinetic1

I have been designing a 3 tier design where:

1st server has the pages to be viewed, they can be:
WAP
FOR PC BROWSER
OTHER

2nd server has the business logic
3rd server has the Data Base

I have already built a test page for the 1st part, but don't know how to link it to the second.

Is there any documentation of how to build a three tier aplication with PHP?

I'm trying to avoid having an 'in between page' that says something like "processing..."

If this post needs more detail please let me know.

thorpe

seems simple enough. what part are you stuck on?

"I have been designing a 3 tier design" cant you just follow your design?

kinetic1

Let's say loggin for example

First server

User puts loggin and password

Second server

Gets the loggin and password through POST
*call's the function in charge of verifying the loggin

Third Server

Second Server
*Open's the new page in first server

First question:

How do I call a function on a diferent PHP file?
Should it be done with objects?

Second question:

When Opening the new page... is REQUIRE all that is needed? or should I refere him somehow to the First Server and send the information again through GET and POST? and display a 'PROCESSING...' page in between?

thorpe

is there any particular reason you want to make this more complicated than it needs to be?

kinetic1

yes,

I'm trying to build a generic arquitecture for bigger proyects to follow. I'm taking it on with a small one.

I was trying to choose between 50% java or 100% php... the decision is obvious ... but I guess 3 tiers adapt better with JAVA. Please prove me wrong ^o

thx
^_

Weedpacket

I don't see why it would be any more difficult in PHP. PHP programs can include or call other PHP programs without any difficulty; certainly there's no reason for any sort of "Processing, please wait" page to come up when the first tier is communicating with the second tier, or the second tier is communicating with the third tier (and of course, there shouldn't be, becuase those communications have nothing to do with the interaction between the first tier and the user).

After all, how is it different from PHP calling on a DBMS or other external service?