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Joomla! 1.5 Development Cookbook

James Kennard

Solve real world Joomla! 1.5 development problems with over 130 simple but incredibly useful recipes
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Book Details

ISBN 139781847198143
Paperback360 pages

About This Book


  • Simple but incredibly useful solutions to real world Joomla! 1.5 development problems
  • Rapidly extend the Joomla! core functionality to create new and exciting extension
  • Hands-on solutions that takes a practical approach to recipes - providing code samples that can easily be extracted

Who This Book Is For

This book is for PHP developers who have experience of developing for Joomla! It does not introduce developing extensions for Joomla!, it is assumed that the reader has prior knowledge of the subject and is looking for a quick guide to solve common problems quickly which commonly occur when developing for Joomla! It does not matter if you are an accomplished Joomla! developer or just starting out. For each scenario that this book addresses, there is an introductory explanation of the problem and an easy to implement solution. For the more accomplished developers recipes also include a discussion of the solution explaining how it works and how it can be further enhanced or customized.

Table of Contents

Chapter 1: Development using and SVN
Setting up a project
Managing members of a project
Setting up Subversion
Understanding the Subversion skeleton
Understanding revisions in Subversion
Understanding the Subversion process
Checking out a Subversion repository using TortoiseSVN
Editing a working copy using TortoiseSVN
Inspecting changes using TortoiseSVN
Updating a working copy and resolving conflicts using TortoiseSVN
Committing changes using TortoiseSVN
Exporting a working copy using TortoiseSVN
Chapter 2: Keeping Extensions Secure
Writing SQL safe queries
Writing SQL-safe LIKE string comparison queries
Using the token
Making a filename safe
Making a directory path safe
Making a path safe
Safely retrieving request data
Getting a value from an array
Chapter 3: Working with the Database
Executing a query
Loading the first cell from the result of a query
Loading the first record from a query
Loading more than one record from a query
Handling DBO errors
Creating a JTable
Creating a new record using a JTable
Updating a record using a JTable
Reading an existing record using a JTable
Deleting a record using a JTable
Checking a record in and out (record locking) using a JTable
Modifying record ordering using a JTable
Publishing and unpublishing a record using a JTable
Incrementing a record hit counter using a JTable
Chapter 4: The Session and the User
Getting the session handler
Adding data to the session
Getting session data
Checking for session data
Checking the session token
Getting the user
Determining if the current user is a guest
Getting the user's name and username
Getting the user's group ID and type
Restricting a user's access using Public, Registered, and Special
Getting the user's parameters
Setting the user's parameters
Extending and editing user parameters
Sending an email to the user
Chapter 5: Multilingual Recipes
Creating a translation
Translating some text
Determining the character length of a UTF-8 string
Removing leading and trailing UTF-8 whitespace
Comparing UTF-8 strings
Finding a UTF-8 string in a UTF-8 string
Executing a regular expression on a UTF-8 string
Reversing a UTF-8 string
Extracting a substring from a UTF-8 string
Replacing occurrences of a UTF-8 string in a UTF-8 string
Accessing characters in a UTF-8 string by position
Converting a string from one encoding to another
Creating a UTF-8 aware database installation script
Chapter 6: Interaction and Styling
Getting page and component parameters
Adding CSS to a page
Overriding component templates
Adding JavaScript to a page
Creating a modal window
Generating modal content
Updating an element using Ajax and MooTools
Updating an element based on a form using Ajax and MooTools
Providing an Ajax response from a component
Enabling pagination in a list of items
Chapter 7: Customizing the Document
Setting the document title
Setting the document generator
Setting the document description
Adding metadata to the document
Changing the document character set
Changing the document MIME type
Controlling client caching of responses
Creating a PDF in a component
Creating an RSS or Atom feed in a component
Outputting a RAW document from a component
Using a custom JDocument in a component (PHP 5 only)
Chapter 8: Customizing the Backend
Disabling the menu bar
Setting the toolbar title and icon
Adding common item manipulation buttons to the toolbar
Adding common itemized manipulation buttons to the toolbar
Adding custom buttons to the toolbar
Adding spacers and dividers to the toolbar
Adding a help system to a component
Creating a filter header for tabular data in an MVC component
Filtering tabular data in an MVC component
Creating toggle-enabled order column headers for tabular data in an MVC component
Ordering tabular data in an MVC component
Chapter 9: Keeping it Extensible and Modular
Loading plugins
Invoking a plugin
Creating a Joomla! search plugin
Creating your own library and import function
Installing a plugin programmatically during a component installation
Managing categories the easy way
Defining JParameters using XML
Creating a JParameter object
Rendering a JParameter object
Saving JParameter data
Getting and setting values in a JParameter object
Defining your own JParameter type
Chapter 10: JObjects and Arrays
Getting a JObject property
Getting all of the public JObject properties
Setting a JObject property
Setting a batch of JObject properties
Reporting an error in a JObject
Getting an error from a JObject
Getting all errors from a JObject
Converting an object to an array
Converting an array to an object
Getting a column from a multidimensional array
Getting a value from an array
Casting all elements of an array to integers
Sorting an array of objects
Imploding an array
Chapter 11: Error Handling and Reporting
Raising an error-level J!error
Raising a warning-level J!error
Raising a notice-level J!error
Enqueuing a message
Changing the default J!error handling
Handling and raising a bespoke J!error
Logging errors and events using JLog
Throwing exceptions with PHP 5
Catching exceptions with PHP 5
Chapter 12: Files and Folders
Checking whether a file or folder exists
Reading a file
Deleting a file or folder
Copying a file or folder
Moving and renaming files and folders
Creating a folder
Uploading files to Joomla!
Reading a directory structure
Changing file and folder permissions

What You Will Learn


  • Make your extensions extensible, add extensions points to allow third parties to customize your extension
  • Create international extensions by enabling multilingual capabilities
  • Build more than just HTML pages - create PDF documents, Atom Feeds, and more!
  • Improve the user experience by adding Ajax
  • Create Atom and RSS feeds to keep users up-to-date
  • Utilize the power of Subversion to maintain your source code
  • Execute database queries and handle returned data in order to access and modify your data
  • Dynamically extend your database tables using JParameter to make your extensions more flexible
  • Keep your gremlins at bay by handling errors the Joomla! way
  • Work with the file system, interrogate existing files and folders and store data in the file system
  • Take control of your workflows by using to manage your Joomla! projects

In Detail

Joomla! is the world's hottest open-source content management system. Out of the box, Joomla! does a great job of managing the content needed to make your website sing. Many Joomla! developers face common implementation hurdles, some might want to rapidly extend the Joomla! core functionality or might want to create new and exciting extensions.

This book has a "wealth" of solutions for problems that Joomla! developers face regularly. It provides step-by-step mini examples which show how to overcome common design and implementation problems when creating Joomla! extensions. It will help you setup a sustainable collaborative development environment using the powerful free services offered by

This book can be used in different ways. It can be used by the pro Joomla! developer looking for a specific solution to a problem and can also be used by a novice developer looking for an insight into an area of common problems, such as effectively handling errors in Joomla! Readers who choose to read an entire chapter will first be given a brief overview of the topic in hand and its role and importance when developing for Joomla! The Recipes contained within the chapter will introduce the reader to specific problems and provide hands-on solutions. It provides solutions for core design topics including security, data access, users, sessions, and multilingual capabilities.


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