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Manual Index

Index of Articles

Get Started

Preface
Get Started

GIT

Git
Git Basics
GitHub Example 1: This Manual
GitHub Example 2: Joomla! CMS

IDEs

IDE
phpStorm
Visual Studio Code
Eclipse

Reference

Joomla! Development Strategy
Technical Requirements

General Concepts

Namespaces

Namespaces
Finding Class files with PSR4
Joomla Namespace Prefixes
Defining your Namespace Prefix
Class Autoloading

Extension And Dispatcher

Extension and Dispatcher Classes
Extension Class for Components
Dispatcher Class for Components
Extension and Dispatcher Classes for Modules
Extension and Dispatcher Classes for Plugins

Categories

Categories Overview
Using the Categories API
Implementing Categories in your Component

Dependency Injection

Dependency Injection
Basic Concept
The Dependency Injection Container
JConfig Example
Extensions and Child Containers
Registering Subdependencies
Modules and Plugins
Dependency Injection Issues

ACL

ACL
How Joomla Access Works
Permissions

Database

Introduction
Select Data from the Database
Query Results
Insert Data into the Database
Updating a Record
Deleting a Record

Forms

How Forms Work
MVC and other considerations
Server-side Validation
Client-side Validation
Manipulating Forms

Form Fields

Standard Form Fields
Standard Form Field Attributes
Custom Fields Overview
Example Custom Fields

Form Fields A-C

Accessiblemedia Form Field
Accesslevel Form Field
Aliastag Form Field
Author Form Field
Cachehandler Form Field
Calendar Form Field
Captcha Form Field
Category Form Field
Checkbox Form Field
Checkboxes Form Field
ChromeStyle Form Field
Color Form Field
Combo Form Field
Componentlayout Form Field
Components Form Field
Contenthistory Form Field
ContentLanguage Form Field
Contenttype Form Field

Form Fields D-I

DatabaseConnection Form Field
Editor Form Field
Email Form Field
File Form Field
Filelist Form Field
Folderlist Form Field
Frontendlanguage Form Field
Groupedlist Form Field
Headertag Form Field
Hidden Form Field
Imagelist Form Field
Integer Form Field

Form Fields L-N

Language Form Field
Lastvisitdaterange Form Field
Limitbox Form Field
List Form Field
Media Form Field
Menu Form Field
Menuitem Form Field
Meter Form Field
ModalSelect Field
Modulelayout Form Field
Moduleorder Form Field
Moduleposition Form Field
Moduletag Form Field
Note Form Field
Number Form Field

Form Fields O-S

Ordering Form Field
Password Form Field
Plugins Form Field
Pluginstatus Form Field
Predefinedlist Form Field
Radio Form Field
Radiobasic Form Field
Range Form Field
Redirectstatus Form Field
Registrationdaterange Form Field
Rules Form Field
Schemaorgcomponentsections Form Field
Sessionhandler Form Field
Spacer Form Field
SQL Form Field
Status Form Field
Subform Form Field

Form Fields T-W

Tag Form Field
Telephone Form Field
Templatestyle Form Field
Text Form Field
Textarea Form Field
Time Form Field
Timezone Form Field
Transition Form Field
URL Form Field
User Form Field
Useractive Form Field
Usergrouplist Form Field
Userstate Form Field
WorkflowComponentSections Form Field
Workflowcondition Form Field
Workflowstage Form Field

Guided Tours

Guided Tours

Icons

Icons

Input

Input

Javascript

Adding JavaScript to your Extension
Ajax and JsonResponse
Using com_ajax for Modules, Plugins and Templates
Joomla core.js
Joomla Editors script
Joomla Dialog (popup) script
Content select (in modal) and cross window communication

Mail

Mail

Menus Menuitems

Menus and Menuitems

Multilingual

Multilingual

Routing

Routing
Parsing an SEF URL
Building an SEF URL
RouterView
Accessing the Component Router class

User

User

Web Asset Manager

Web Asset Manager

Webservices

Web Services

Building Extensions

Build Extensions

Install Update

Manifest Files
Install Process and Script Files
Changelogs
Packages
Update Servers

Components

Components
Joomla Model View Controller pattern
MVC Overview
MVC Factory Overview
Post-Request-Get Pattern
Joomla Library MVC Classes
Component Examples
Example Form Component
Ajaxdemo Component
Custom Fields
Quicktask Link and Icon
Routing
Hide Table Columns
Tags
Dashboard

Libraries

Libraries
Creating a Joomla Library

Modules

Modules
Module Development Tutorial
Step 1 Basic Module
Step 2 Adding a tmpl file
Step 3 Adding a helper file
Step 4 Adding Language Support
Step 5 Adding Configuration
Step 6 Adding a Script File
Step 7 Adding Javascript
Step 8 Dependency Injection
Step 9 Adding Ajax
Step 10 Using AbstractModuleDispatcher
Step 11 Update Server
Basic Module

Plugins

Plugins
How Plugins Work
Joomla 4 and 5 Changes
Plugin Tutorial
List of Plugin Events
Content Events
Plugin Examples
Ajax Plugin
Console Plugin - Hello World
Console Plugin Example - Execute a file of SQL statements
System Plugin Router Rules
Filesystem Plugin - Basic
Filesystem Plugin - FTP
Captcha Plugin
Editors Plugin
Editors Buttons (XTD) Plugin
User Plugin
WorkflowPlugin

Templates

Templates
Color scheme support
Custom Error Pages
Supporting Right to Left Languages
templateDetails.xml
Template

Custom Script

Custom PHP Script
Example PHP Script
To Logon or not to Logon
Install

Accessibility

Accessibility
You code for humans, not machines.
WCAG Conformance
ATAG Conformance
Best Practices for Accessible Design
Page Template
Tooltip
Accessible UI Library
Element Template
Testing Accessibility
Reporting Errors
Further Reading

Security

Security
Fundamentals
Common Vulnerabilities
Input Handling
Secure DB Queries
CSRF Protection
Forms & Validations

Web Services Api

Web Services API
JSON Response Format

Common Errors

Common Errors

Testing

Testing
Automated Testing
Concepts
System Testing
Setup your testing environment
Writing Tests
Unit Testing
Setup your testing environment
Writing Tests
Manually Testing

User Interface Text

User Interface Text Guidelines
A Z
Action or Description
Capitalisation
Use of the Joomla Name
Punctuation
Words to Watch
External References

Changelog

Changes to the CMS and the API

Security

This section will teach you how to develop secure code for Joomla core and Joomla extensions.

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