What are the layers of N-tier structure and their functions for WEB Development in PHP?

Posted by Starx on Stack Overflow See other posts from Stack Overflow or by Starx
Published on 2010-05-14T11:22:22Z Indexed on 2010/05/14 11:24 UTC
Read the original article Hit count: 349

Filed under:

php

|

web-programming

|

oop

|

n-tier

Can anyone can tell me the N-tier Structure used in Web Programming?

Primarily, in 3 tier structure one is presentation layer, another is business logic layer and last is database access layer.

But for N-tier or 4 tier structure what are the layers and what sort of functions do they hold on them? Please explain me with a brief example of each.

© Stack Overflow or respective owner

Related posts about php

Magento, NGINX, PHP-FPM, APC, MEMCACHED, 16gb Ram CentOS, Spiking PHP-FPM to 100% CPU

as seen on Server Fault - Search for 'Server Fault'
I have been trying to resolve my issue of spiking cpu caused by php-fpm processes. I've reduced the php-fpm config settings to: pm = ondemand pm.max_children = 12 pm.start_servers = 2 pm.min_spare_servers = 2 pm.max_spare_servers = 10 pm.max_requests = 500 php_admin_value[memory_limit] = 128M Problem… >>> More
PHP Pear Installation on CentOS

as seen on Server Fault - Search for 'Server Fault'
[root@ip ~]# yum install php-pear* Reducing CentOS-5 Testing to included packages only Finished Setting up Install Process Package 1:php-pear-1.8.1-2.el5.centos.noarch already installed and latest versio … >>> More
Apache configurations for php "AddType text/html php" or "AddType application/x-httpd-php php .php"

as seen on Server Fault - Search for 'Server Fault'
I am taking over an application server and discover that it contain the following settings: AddType text/html php Although it works, but my understanding is that it should set as following: AddType application/x-httpd-php php .php What are the key differences between the two settings?… >>> More
mod_rewrite settings causes server to throw HTTP 500 errors instead of 404

as seen on Server Fault - Search for 'Server Fault'
Hello. I have a server with VBulletin forum (working under Apache 2.2, CentOS). The default settings for it in .htaccess are as follows: RewriteEngine on RewriteCond %{HTTP_HOST} ^gsmforum\.ru RewriteRule (.*) http://www.gsmforum.ru/$1 [R=301,L] # If you are having problems or are using VirtualDocumentRoot… >>> More
Problems installing Memcache (PECL extension)

as seen on Server Fault - Search for 'Server Fault'
I have installed memcached fine, and now I will need to install PECL extension memcache. Im running RedHat x86_64 es5. The installation gives me this: downloading memcache-2.2.6.tgz ... Starting to download memcache-2.2.6.tgz (35,957 bytes) ..........done: 35,957 bytes 11 source files, building running:… >>> More

Related posts about web-programming

A Simple Guide to Web Programming Services

as seen on Ezine Articles - Search for 'Ezine Articles'
The internet has evolved dramatically over the past 10 years or so. From simple static webpages containing no more than text and images, it has transformed to highly interactive content. It has come to the point that the web may very well be your virtual desktop. This article describes the basic foundation… >>> More
General Web Programming/designing Question: ?

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, I have been in web programming for 2 years (Self taught - a biology researcher by profession). I designed a small wiki with needed functionalities and a scientific RTE - ofcourse lot is expected. I used mootools framework and AJAX extensively. I was always curious when ever I saw the query strings… >>> More
Sources for iPad web programming?

as seen on Stack Overflow - Search for 'Stack Overflow'
Anyone got some good references for targeting web content to the iPad web browser? i know its still very early days but I havent got any good indicator on how to setup CSS to fix iphone/ipod touch versus the larger screen of the iPad? or do I just consider it to be like safari on the bigger Macs >>> More
Comparisons of web programming languages (on speed, etc.)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm looking for a site / report / something that can compares "identical" programs (programs that do the same thing) in different web-programming languages and then compares the speeds of each of them. I agree that there will be MANY MANY criteria on which this information can be sliced and diced… >>> More
On studying web programming

as seen on Stack Overflow - Search for 'Stack Overflow'
What are the best resource to study the following: JavaScript, AJAX, CodeIgniter Smarty? >>> More