====== Magento folder structure ======

Here’s short overview:


__/ app__ - is where the application resides

__/ app / etc__ - is global configuration den

__/ app / code__ - is where modules installed their models and controllers

__/ app / code / core__ - are core team developed or certified modules

__/ app / code / community__ - are community contributed modules

__/ app / code / local__ - are local customizations

__/ app / code / core / Mage__ - magento default namespace

__/ app / code / core / Mage / {Module}__ - module root

__/ app / code / core / Mage / {Module} /__ etc - module configuration

__/ app / code / core / Mage / {Module} /__ controllers - controllers provided by module

__/ app / code / core / Mage / {Module} / Block__ - Block logic classes

__/ app / code / core / Mage / {Module} / Model__ - Object Models provided by module

__/ app / code / core / Mage / {Module} / Model / Mysql4__ - Resource Models provided by module

__/ app / code / core / Mage / {Module} / sql__ - sql installation and upgrade files between module versions

__/ app / code / core / Mage / {Module} / sql / {resource} /__ - resource model specific upgrades

__/ app / code / core / Mage / {Module} / sql / {resource} / {type}-{action}-{versions}.(sql|php)__ - resource update files. example: mysql4-upgrade-0.6.23-0.6.25.sql

__/ app / design__ - is location of design packages (layouts, templates, translations)

__/ app / design / frontend__ - frontend design

__/ app / design / adminhtml__ - HTML admin panel design

__/ app / design / {area} / {package} / {theme}__ - theme customizations

__/ app / design / {area} / {package} / {theme} / layout__ - .xml files that define block structure for different cases in website flow

__/ app / design / {area} / {package} / {theme} / template__ - .phtml (html with php tags) templates

__/ app / design / {area} / {package} / {theme} / locale__ - Zend_Translate compatible translation files for package/theme

__/ app / locale__ - locale files

__/ app / locale / {locale (en_US)}__ - Zend_Translate compatible translation files for modules

__/ skin / {area} / {package} / {theme} /__ - is where design package css and images are

__/ lib__ - are libraries such as Zend and Varien

__/ js__ - are javascripts smile

__/ media__ - uploaded files (product images, pdf documents, etc)

__/ tests__ - Unit tests (not done yet)

__/ var__ - temporary files