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Learning Joomla! 3 Extension Development-Third Edition [Englisch] [Taschenbuch]

Tim Plummer
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26. Juli 2013

If you have ideas for additional Joomla 3! features, this book will allow you to realize them. It's a complete practical guide to building and extending plugins, modules, and components. Ideal for professional developers and enthusiasts.


  • Clear steps to create your own plugins, modules, and components for Joomla 3
  • Guides you through extending your components by allowing them to interact with modules and plugins
  • Introduces you to packaging your extensions for distribution to other Joomla users
  • Enables you to secure your extensions and avoid common vulnerabilities by gaining some white hat hacking experience

In Detail

Joomla 3 is the first of the major open source content management systems that was meant to be mobile friendly by default. Joomla uses object-oriented principles, is database agnostic, and has the best mix of functionality, extensibility, and user friendliness. Add to that the fact that Joomla is completely community driven, and you have a winning combination that is available to everyone, and is the perfect platform to build your own custom applications.

"Learning Joomla! 3 Extension Development, Third Edition" is an integrated series of practical, hands-on tutorials that guide you through building and extending Joomla plugins, modules, and components. With Joomla having been downloaded well over 35 million times, there is a huge market for Joomla extensions, so you could potentially earn some extra cash in your spare time using your newly acquired Joomla extension development skills.

We will start with developing simple plugins and modules, and then progress to more complex backend and frontend component development. Then we will try our hand at ethical hacking, so you will learn about common security vulnerabilities and what you can do to avoid them. After that we will look at how you can prepare your extensions for distribution and updates, as well as how you can extend your components with various plugins and modules. Finally, you will end up with a fully functioning package of extensions that you can use on your own site or share with others.

If you want to build your own custom applications in Joomla, then "Learning Joomla! 3 Extension Development" will teach you everything you need to know in a practical, hands-on manner.

What you will learn from this book

  • Extend Joomla using plugins
  • Develop both frontend and backend modules
  • Build a Joomla component that looks and behaves like the core components, to reduce the learning curve for your users
  • Discover common security vulnerabilities and what you can do to avoid them
  • Prepare your extensions for distribution
  • Manage updates and set up an update server
  • Integrate third party extensions in your component


A practical guide with step-by-step examples that build on each other so you can learn by doing and get hands-on knowledge about creating your plugins, modules, and components in Joomla.

Who this book is written for

"Learning Joomla! 3 Extension Development" is for developers who want to create their own Joomla extensions. It is assumed you will have some basic PHP, HTML, and CSS knowledge, but you don’t need any prior Joomla programming experience. This book will also be useful to people who just want to make minor customizations to existing Joomla extensions and build on the work of others in the open source spirit.

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Learning Joomla! 3 Extension Development-Third Edition + Praxiswissen Joomla! 3.0
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  • Taschenbuch: 458 Seiten
  • Verlag: Packt Publishing; Auflage: 3 (26. Juli 2013)
  • Sprache: Englisch
  • ISBN-10: 1782168370
  • ISBN-13: 978-1782168379
  • Größe und/oder Gewicht: 2,3 x 18,8 x 23,1 cm
  • Durchschnittliche Kundenbewertung: 5.0 von 5 Sternen  Alle Rezensionen anzeigen (1 Kundenrezension)
  • Amazon Bestseller-Rang: Nr. 125.636 in Fremdsprachige Bücher (Siehe Top 100 in Fremdsprachige Bücher)

Mehr über den Autor

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Über den Autor und weitere Mitwirkende

Tim Plummer

Tim Plummer is a Joomla! enthusiast and extension developer who has been building websites for over ten years, and specializing in Joomla! since 2008. Tim has developed and maintained several popular components, modules, and plugins, which are listed on the Joomla! Extension Directory, in addition to his day job in IT for a multinational manufacturer. Tim lives in Sydney, Australia, with his wife, Tamlyn, who runs her own design agency and two kids, Zane and Ava-Lily, who keep Tim very busy. At university Tim studied Engineering, and he has a Bachelor of Engineering in Telecommunications Engineering degree, however his passion in IT has been his career focus.

Tim is very active in the Joomla! community; in January 2012 Tim took on the convener role for the Sydney Joomla! User Group (JUG), and he has been coorganizer for the annual Joomla!Day Sydney conference since 2011, taking on the coordinator role in 2013. Tim has run Joomla! development workshops at Joomla! Day conferences and various JUG groups throughout Australia, and is a regular presenter at the Sydney JUG.

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5.0 von 5 Sternen als Geschenk 1. März 2014
Von Lüttmen
Format:Taschenbuch|Verifizierter Kauf
für den Freund meiner Tochter, Informatiker das Buch schlecht hin.
Ich kann leider weniger dazu mitteilen. Als Geschenk für die Compifreaks
genau richtig, Hinweis: Sprache in Englisch.
War diese Rezension für Sie hilfreich?
Die hilfreichsten Kundenrezensionen auf Amazon.com (beta)
Amazon.com: 4.3 von 5 Sternen  10 Rezensionen
9 von 10 Kunden fanden die folgende Rezension hilfreich
4.0 von 5 Sternen Excellent book with one flaw 22. Oktober 2013
Von dgpe - Veröffentlicht auf Amazon.com
As with any Content Management System that I have used or experimented with, there are two very different ways of using it. One is simply to use the off the shelf CMS with whatever add-ons are available (of which there are usually many). In this case people who are unfamiliar with the system generally need a 'how-to' book that explains how to administrator the system and create and manage content. The other way of using it, which in my experience is where a lot of people end up, is to develop their own add-ons to provide specific functionality that isn't otherwise available.

In Joomla there are essentially three types of add-ons, of which Components probably offer the most scope for custom development and so it is essential to have a good explanation of how to put a Joomla Component together for anyone who plans to do Joomla development (it's worth noting that some familiarity with HTML5, CSS3, PHP, and MySQL is probably also essential before you start). What also makes it difficult is that unfortunately the documentation available for Joomla is frankly awful and virtually impenetrable to a novice. Most of the critical information is available on the web but it is organized in a way that only someone who is not a novice can make sense of. There are one or two tutorials on developing components, but they are not highly detailed and leave a lot of gaps in the explanation, making it extremely difficult to use them if you don't already know quite a bit about the subject.

This book addresses the problem excellently, providing a clear, stepwise approach to show how to develop a fully-functioning Joomla component. It's fair to say that the Model-View-Controller approach which is adopted in the current version of Joomla 3 is a little complicated to understand at first, as there is a need to create a lot of folders and files just to get a relatively basic component running, but that's not the author's fault. It wouldn't be reasonable to expect this book to cover in detail all of the philosophy and nuances of the MVC approach but it does explain enough for it to make sense in the context of Joomla.

The only complaint I have about the book, which made it a 4-star review rather than 5, is that the author uses an approach to naming the different files and classes that is very confusing and needs very careful reading to understand if you are not already familiar with it. For example, many classes and functions are prefixed with the name that you have given to the component you are creating, and also include the name of the view, table, model, etc. that they refer to. The example that the author presents in the book is for the creation of a component called 'Folio'. Unfortunately he also uses 'folio' as the name of many of the views, tables, etc. that are created as part of the component. This leads to Classes with names like FolioViewFolio (which is separate from FolioViewFolios - note the plural) which quickly becomes confusing for someone new to all this. If everything is has a name that is some variation of 'folio' with or without capitals, it is difficult to follow. Some of this is due to naming conventions that Joomla uses, and the rest probably adheres to normal practice for those who are expert in this field, and it is true that after a while, and some very careful study, it begins to fall into place, but it only makes a somewhat confusing subject even more so in the early stages. It IS possible not to use this uniform naming approach, and after a couple of false starts, I changed the names of various elements as I was entering the code, so that I could see more clearly what was being referred to. Everything worked fine and the role of each of the different pieces was much clearer to me. This in itself was not a trivial task though and it would have made things much simpler if the author had taken off the hat of the expert and tried to view the code from the perspective of the learner a bit more when considering the naming of the different elements.

Overall though, this book stands out - not only as one of the few resources available to anyone trying to develop Joomla components, but one that does actually explain how to do it in a way that leads you to a fully working example that you can modify and learn from, and with the exception of the naming issue discussed above, this book would be difficult to improve upon.
3 von 4 Kunden fanden die folgende Rezension hilfreich
3.0 von 5 Sternen Nothing much new in here 17. Januar 2014
Von Lance Keashly - Veröffentlicht auf Amazon.com
Format:Taschenbuch|Verifizierter Kauf
Compared to the 2.5 development books I have, nothing much new I have seen.

Lots of "use this code" but little explanation as to why, which is what I saw in the 2.5 development books as well.

That kind of instruction reminds me of the joke about the person that always cooked their hams by cutting off the end peices before placing them in the roasting pan because that is what they were taught by their mom who learned it from her mom. when their child asked why they didn't know so they asked. Eventually they found out that the great grandmother had a small oven and a correspondingly small roasting pan so the only way the hams she bought fit was to cut off the ends.
1 von 1 Kunden fanden die folgende Rezension hilfreich
4.0 von 5 Sternen useful 28. August 2013
Von W Boudville - Veröffentlicht auf Amazon.com
I tried using WordPress to build a website, but found it too restrictive in its offering of templates. So I wandered over to Joomla. This book describes the very latest version 3. It does seem more powerful and flexible than WordPress, with one major caveat. WordPress is often directed at people who do not want to do much programming; typically they have little experience in it. Whereas the present book is unabashedly aimed at a programmer, starting with the first chapter. So a significant amount of time needs to be invested in learning the material.

The overall trend is to use free software. Notably MySql as the database and PHP for coding. While an IDE is also recommended. Nicely, Eclipse can be used. And versioning is possible for complex projects via git or subversion.

One thing to get out of the book is the hierarchy of complexity, starting with simple plug-ins, and gravitating to modules and components. Each type is discussed in some detail. Unsurprisingly, components can require some intricacy in coding. The code snippets for components are rather long for snippets. But this reflects how much typically needs to be done.

A major enhancement of version 3 is that it now supports different types of databases, not just MySql. You can use Microsoft's SQL Server and PostgreSql. Some readers will surely cheer. Thing is, you need to do specific steps for each of those types to integrated into Joomla. The book only gives a brief example of how to use SQL Server. Perhaps a later version of the text will also show the customising for PostgreSql.

Another nice aspect of Joomla is how you learn to internalise the Model View Controller pattern as the most basic and important pattern for website development. The separation of content from presentation is so necessary and fundamental to the entire working of Joomla coding.
5.0 von 5 Sternen Well-presented, thorough, and with all the necessary background information 24. November 2013
Von Donna - Veröffentlicht auf Amazon.com
Format:Kindle Edition
First, let me say that I downloaded the Kindle version of this from PacktPub.com. I was concerned about the screenshots being viewable because my other (unrelated) Kindle books from Amazon had photos and illustrations that were such a low resolution they were not helpful. Fortunately, the screenshots in this book are clear enough to view and get all the details needed.

I've been building Joomla! sites since 2006 and building custom extensions since 2009. There are many new features in Joomla! 3 and so there's always more learning to do.

The author goes into background and explanation of what's going on in the world of Joomla! development, both core and extensions, and what can be expected in the foreseeable future. This is information everyone who builds Joomla! sites for clients needs to know, whether they do any coding of their own or not.

The author also touches on subjects, then states that it is beyond the scope of this book. I consider this a good thing, because even though he doesn't go in-depth about these out-of-scope topics, it gives the reader "extra curricular" study to explore on their own after completing the book. It's good to know what else you need to learn about.

This book is written so that beginning programmers can follow. (Note: You need to be familiar with the Joomla admin - installing and maintaining a Joomla site.) Even if you have light experience with PHP, you will be able to follow along and get a good foundation in building custom Joomla! extensions, for yourself, the community, or as a business. (By the way, he also discusses the various business models and the JED.)

I feel that "Learning Joomla! 3 Extension Development" is a must-read, because even if you are not building extensions from scratch, you will at some point want to tweak some of the 3rd party extensions you use. Knowing how to will give you tremendous control over what you can do with your site.
5.0 von 5 Sternen Finally I got my first component working 23. August 2014
Von herman van cauwelaert - Veröffentlicht auf Amazon.com
Format:Taschenbuch|Verifizierter Kauf
Clearly explained without getting lost in details.
Who to start from scratch and make your own component work.
A good understanding of Object Oriented programming is a must for as far as I see things.
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