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File and folder structure.

Extension

Author: Taufik Nurrohman · 408 Views

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WTF is extension?

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Extension is a core feature enhancer that has a higher level than plugin. An extension doesn’t have to change the behavior of your site directly, it can also be used as an API enhancer that does nothing until you use it on a particular plugin or shield, or even in a private function file that you have.

An extension is a folder with a unique name, stored in lot\extend folder:

lot\
 └── extend\
     ├── asset\
     ├── page\
     ├── extension-1\
     ├── extension-2\
     ├── …
     └── …

A standard extension should at least contains files that structured like this:

extension-1\
 ├── engine\
 │   ├── kernel\
 │   │   └── extension-1.php
 │   ├── plug\
 │   │   └── extension-1.php
 │   └── fire.php
 ├── lot\
 │   ├── asset\
 │   │   ├── .htaccess
 │   │   ├── css\
 │   │   └── js\
 │   ├── language\
 │   │   ├── en-us.page
 │   │   └── id-id.page
 │   └── state\
 │       └── config.php
 ├── about.page
 └── index.php

But the simplest one can be achieved as:

extension-1\
 ├── about.page
 └── index.php

Note: The .htaccess file is required to enable access of the asset files publicly. It only contains this command:

allow from all

The most important part is the index.php file. The automatic extension loader will seek for index.php file and once it found, then the engine will include it before the shield is loaded. Some alternative name can be used like __index.php to make it loaded only if back-end mode is active, and index__.php that will be loaded only in the front-end.

Note: Mecha currently will load index.php away as this is the standard file format that works in both front-end and back-end mode. But, since the core version does not understand between back-end and front-end, so a file named index__.php will also be loaded away. The only file that will not be included automatically is __index.php because Mecha does not look for it by default. The front-end and back-end distinguisation is a feature that never existed until somebody create their own back-end feature. And in that feature, a function may load the __index.php file with their own conditional statement that works by distinguish whether we are currently in the front-end or back-end.

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