Develop advance joomla! MVC Component for version 3

Develop Advance Joomla! MVC Component for version 3.x

Gunjan Patel

Sr. PHP Developer

Joomla! Bug Squad Member

Joomla! SQL Optimisation team coordinator

Google Summer Of Code 2014 Mentor

Joomla! User Network Ahmedabad

Meet my Joomla! Family

[email protected]

Time to play with the Database

Joomla! User Network Ahmedabad Gunjan Patel @ergunjanpatel


Create two files:

1. admin/sql/install.mysql.utf8.sql

2. admin/sql/updates/mysql/0.0.6.sql

Important:#__schemas table will be used for upgrades


Adding a new field type: type="helloworld"

Field file path

Field Custom Type:helloworld

Notice that it was Before list

Let’s create field at admin/models/fields/helloworld.php


Parent field type

Same as filenameFile Name should be same asField type name

Class name prefix

Should be same as filename

Continue with… admin/models/fields/helloworld.php


Overriding parent class forHTML select list options.

Get Database Object

Joomla Query Language functions

Looping to create options arrayJHTML options type value text

Display the chosen message from field type in menu using Database Table



Create the admin/tables/helloworld.php file

Table Name

Primary Key


Modify the site/models/helloworld.php file

Return the table instance

Add new getTable function


Modify the site/models/helloworld.php file

Update getMsg function to get Message from Database

Get message id from request.Notice that here we are not using $_POST or $_GET

Load table data from auto increment id

Update in helloworld.xml


ZIP it

Develop Basic Backend



Create the admin/helloworld.php file


Create the general controller admin/controller.php file

Set Default view of component

Component prefix. Typically name of component


Create the view admin/views/helloworlds/view.html.php file

Parent ClassView NameComponentName as class prefix

Call Model get Item function and pagination function to support pagination


Create the layout admin/views/helloworlds/tmpl/default.php file


Create the sub-layout admin/views/helloworlds/tmpl/default_head.php file


Create the sub-layout admin/views/helloworlds/tmpl/default_body.php file


Create the sub-layout admin/views/helloworlds/tmpl/default_foot.php file


Create the Model admin/models/helloworlds.php file

Parent class for listing Function of joomla.

getListQuery function return query object

Review helloworld.xml


ZIP it

• Language files naming conventions:

–For components

• en-GB/en-GB.com_helloworld.ini

–For Menus

• en-GB/en-GB.com_helloworld.sys.ini


Adding Language Translation Files


Language File Naming Pattern

For Example:

en-GB : Language code for English (UK)gu-IN : Language code for Gujarati (India) hn-IN : Language code for Hindi (India)

<language code>-<country code>


Language File Naming PatternFor Example:en-GB : Language code for English (UK)gu-IN : Language code for Gujarati (India) hn-IN : Language code for Hindi (India)

<language code>-<country code>

<language code>-<country code>.com_<component_name>.[type].ini

For Example:en-GB.com_helloworld.inigu-IN.com_helloworld.ini----------------------------------------en-GB.com_helloworld.sys.iniGu-IN.com_helloworld.sys.ini


Language String Pattern

For Example:

COM_HELLOWORLD="Hello World!"COM_HELLOWORLD_DESCRIPTION="This is the Hello World description"COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_TITLE="Hello World"COM_HELLOWORLD_HELLOWORLD_VIEW_DEFAULT_DESC="This view displays a selected message"COM_HELLOWORLD_MENU="Hello World!"

<language_key>=“<language_string_value>”

Language File Location Options in helloworld.xml file



Language File Naming Pattern


or simply in ROOT

Update helloworld.xml


ZIP it


Any Questions?

Develop advance joomla! MVC Component for version 3

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