Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Extending Symfony2 Web Application Framework
Extending Symfony2 Web Application Framework

Extending Symfony2 Web Application Framework: Symfony2 took the great features of the original framework to new levels of extensibility. With this practical guide you'll learn how to make the most of Symfony2 through controlling your code and sharing it more widely.

eBook
€8.99 €22.99
Paperback
€28.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Table of content icon View table of contents Preview book icon Preview Book

Extending Symfony2 Web Application Framework

Chapter 2. Commands and Templates

In this chapter, we will review two of the most common kinds of extensions that you will encounter while working on a Symfony project:

  • Commands: They are similar to the ones that Symfony brings you, such as the ones already in the framework (cache:clear, doctrine:database:create, and so on)

  • Twig: It's relatively easy to extend the templating language of Symfony as well

Commands


Symfony ships with a powerful console component. Just like many components in Symfony, it can also be used as a standalone component to create command-line programs. In fact, Composer (http://getcomposer.org), the dependency manager that you use every day with Symfony, has its command line-based on the Symfony Console component.

Let's find out how to create commands and what they are good for.

The initial situation

Our site users have a profile on the website. On their profile, they can upload their own picture (in any avatar). They can upload any kind of picture with different sizes and ratios, and the system will crop it and/or resize it to a square picture of 150 x 150 pixels. We always keep the higher resolution uploaded picture but pregenerate the 150-pixel one to improve the load speed of our site. Now that so many people are browsing our site from very high resolution tablets, we need to make that profile picture also available in 300 pixels size.

This is a relatively heavy task...

Twig


By default, Symfony ships with the Twig templating system. Twig is incredibly powerful and out of the box. The possibilities offered by blocks, extending templates, including templates, and macros are huge and will be enough for most cases. There are cases where you still need something more though, and an extension for Twig is the only elegant way of doing so.

Twig offers five different ways to create extensions:

  • Globals: This lets you define some global variables that are available in all templates. You could access them like any other variable.

  • Functions: This will let you write {{my_function(var)}}.

  • Tests: These are specific functions that return Boolean values and can be used after the is keyword in templates.

  • Filters: They modify the output of an output tag.

  • Tags: This will let you define custom Twig tags.

Some of the pages on our website will require some JavaScript in them to make them a bit more dynamic or simple to use. The form to create a meetup for organizers will definitely use...

Summary


With commands, we can now easily create tools for the developers who work on our application. We know that commands have access to the whole service container. We also know how to make them rely as much as possible on services, making the code for the command available to the whole application, if we need it later.

We only saw one form of extensions for templates but know that all other extension types (with the exception of custom tags) are just as easy and straightforward to implement. Custom tags are quite complex, and they are also very rarely needed. You can learn the basics of creating a new tag at http://twig.sensiolabs.org/doc/advanced.html#tags.

Left arrow icon Right arrow icon
Estimated delivery fee Deliver to Italy

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : Mar 25, 2014
Length: 140 pages
Edition :
Language : English
ISBN-13 : 9781783287192
Languages :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
OR
Modal Close icon
Payment Processing...
tick Completed

Shipping Address

Billing Address

Shipping Methods
Estimated delivery fee Deliver to Italy

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Publication date : Mar 25, 2014
Length: 140 pages
Edition :
Language : English
ISBN-13 : 9781783287192
Languages :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 78.97
Persistence in PHP with Doctrine ORM
€24.99
Extending Symfony2 Web Application Framework
€28.99
Symfony2 Essentials
€24.99
Total 78.97 Stars icon
Banner background image

Table of Contents

6 Chapters
Services and Listeners Chevron down icon Chevron up icon
Commands and Templates Chevron down icon Chevron up icon
Forms Chevron down icon Chevron up icon
Security Chevron down icon Chevron up icon
Doctrine Chevron down icon Chevron up icon
Sharing Your Extensions Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.8
(8 Ratings)
5 star 37.5%
4 star 25%
3 star 25%
2 star 0%
1 star 12.5%
Filter icon Filter
Top Reviews

Filter reviews by




Richard R Perez Dec 07, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Is a short and concise book with clear goals. There are some concepts that even I heard before, I thought they was complicate, but with this book I realized that they are very simple.You need to know about Symfony2 is not a beginner book and also you won't learn everything about Symfony2 is a book that teach you how you can create your bundles in a way that they could be reused in other applications and in they way of it, it explains functionalities that can be helpful even if that is not your intention.
Amazon Verified review Amazon
xlthlx May 29, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book is not for beginners, to understand and appreciate it you must have made at least one project with Symphony2.The book presents code examples mainly, very clear, that can be safely reused for your own projects.The ultimate goal of the book is to create and distribute your bundle, but each chapter can be considered separately, and each can help a lot to improve the way to implement functionality in Symfony2.I especially enjoyed the chapter on Commands and how to set them as an interface to Services, because, as written by the author, opening a terminal is already a technical operation for many people, and having a web interface for starting the process that the site admins could use is very powerful.The other chapters that I liked were the one on Doctrine, on how to use with MongoDB and coordinates, and the one on Twig and how to implement a widget for a map.I recommend this book to anyone who wants to deepen and improve his knowledge of Symfony2, and who wants to better understand the logic.
Amazon Verified review Amazon
Johnny B Mar 28, 2014
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I have been programming in PHP semi-professionally for 14 years now. I've done a few small and unpublished Symfony2 projects trying to learn it but never have felt like I was REALLY grasping it. I've found the Yii framework to be easier to use for someone who doesn't program every day as Yii is straight forward and you can dive right in with little refresher. Symfony has made me feel like I'm becoming a dinosaur in the programming world but at the same time I need to get caught up. I'm glad to say that this book is clear and concise (much more so than the Symfony book). It's very easy to follow along and has great examples that you can expand on. Within a few minutes of starting this book I could actually feel the cobwebs in my head clear and could grasp Symfony a whole lot easier. I can see myself jumping into Symfony projects just as easily as Yii and with the extra power and resources that Symfony has. If you are a seasoned PHP developer but having a difficult time grasping Symfony, this book will help you immensely. Thanks to everyone who made this book possible.
Amazon Verified review Amazon
Greg Freeman Jun 30, 2014
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
I've been using symfony2 since its release on numerous projects and I recently read through this book.If you are a beginner or just starting out with symfony2, I suggest you spend your time reading the documentation on symfony.com and working on some test projects first. This book is not beginner friendly and assumes you have a working knowledge of symfony2, some of the explanations are skipped over quickly which is great for the intended audience of the book, as you spend more time of more advanced uses of the framework.If you are an intermediate or more advanced user of symfony2, I am sure you will learn something by reading this book and it is well worth your time. Most books are very general, this book gives some real-world usage tips that you can use in your projects right now.This book has useful information that will
Amazon Verified review Amazon
Stan Jun 12, 2014
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Extending Symnfony by Sébastien Armand is a tutorial-style introduction to a variety of the ways that you can extend a Symfony 2 full stack installation. I’m a big fan of Symfony 2 and I’ve done a fair amount of app building with it, so I was interested in Armand’s book and seeing what new things I could discover about hooking into sf2.The book is filled with code samples, far more than you’ll find in most other technical books. Most of these code samples are also complete, which anyone who has traversed the official Symfony 2 cookbooks will greatly appreciate. Unfortunately, these code samples sometimes cross pages in inconvenient ways, and none of them include syntax highlighting which can make it hard to read at times.Armand tackles six (sort of eight) areas of Symfony 2 development where developers can tap in and extend existing functionality of Symfony 2. First and foremost he kicks off his tutorials with covering service definitions and listeners. These topics seem like they could have been separate chapters to me, but nonetheless he does a good job of giving real world examples of how to tie these things in. He especially does well with event listeners - the secret weapon of the Symfony 2 stack (in my opinion anyhow).Armand’s approach to extending symfony is project-based, meaning that through the book you’re working on building an app that handles some details for meet ups between users. You can think of it like the old Symfony 1 Askeet tutorial. This is a huge advantage of Armand’s book over other Symfony 2 texts you’ll find in the wild. Actual applications create context and drive home the concepts. As an added bonus, in this book you are NOT building yet another task manager!The Security chapter covers some of the more difficult areas of Symfony 2. Anyone who has dealt with Security in sf2 knows that, while extremely powerful, it can also be extremely challenging. Armand’s examples are helpful, especially as he tackles an OAuth implementation. Armand uses the Friends of Symfony UserBundle to get going, but unfortunately didn’t cover with too much depth getting started with this super handy bundle. The examples in the book are priceless, but I look forward to future revisions that cover the new SimpleAuth implementation in Symfony 2. The only other thing I wished Armand would have covered was securing an api with tokens and a custom user provider for doing this. He shows how a cookie can be used with an event listener, but truthfully there are better ways of tackling this problem in Symfony 2 that are more consistent with its security model.One of the most valuable chapters in this book is the Doctrine chapter. Doctrine 2’s official documentation lacks a lot of context. By being a project-based tutorial, Armand actually shows you how to write a custom data type, custom DQL function, and a custom filter, rather than stumble through the Doctrine 2 docs and hope you got close. This chapter in and of itself is a valuable resource for those times when you need to do these things.The final chapter discusses bundles briefly. This is one area of the book I felt could have been fleshed out a bit more. Armand covers the basics, but part of me felt like this chapter almost belonged at the beginning of the book instead of the tail end. The other thing that was missing from this chapter was bundle inheritance which, while a tricky subject, is a huge part of extending a Symfony 2 application.All in all I think this is a solid book on tapping into some of the more powerful features of Symfony 2 and it’s counterpart Doctrine 2. The book is at times a little oddly organized, but the code samples and tip are worthy any web developers time. If you’re looking to dive into some of the things in the book’s table of contents get yourself a copy and profit from Armand’s tutorials and extensive code samples.
Amazon Verified review Amazon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela