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Commit f3c151c

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reworded slightly some sentence to convert the text from a series of articles to a book
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‎book/part01.rst

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@@ -6,7 +6,7 @@ components that solve common web development problems.
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Instead of using these low-level components, you can use the ready-to-be-used
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Symfony2 full-stack web framework, which is based on these components... or
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you can create your very own framework. This series is about the latter.
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you can create your very own framework. This book is about the latter.
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.. note::
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@@ -48,16 +48,16 @@ Symfony2 Components.
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.. tip::
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If you don't have time to read the whole series, or if you want to get
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If you don't have time to read the whole book, or if you want to get
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started fast, you can also have a look at `Silex`_, a micro-framework
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based on the Symfony2 Components. The code is rather slim and it leverages
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many aspects of the Symfony2 Components.
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Many modern web frameworks call themselves MVC frameworks. We won't talk about
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MVC here as the Symfony2 Components are able to create any type of frameworks,
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not just the ones that follow the MVC architecture. Anyway, if you have a look
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at the MVC semantics, this series is about how to create the Controller part
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of a framework. For the Model and the View, it really depends on your personal
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at the MVC semantics, this book is about how to create the Controller part of
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a framework. For the Model and the View, it really depends on your personal
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taste and I will let you use any existing third-party libraries (Doctrine,
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Propel, or plain-old PDO for the Model; PHP or Twig for the View).
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@@ -147,8 +147,8 @@ start with the simplest web application we can think of in PHP::
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printf('Hello %s', $input);
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That's all for the first part of this series. Next time, we will introduce the
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HttpFoundation Component and see what it brings us.
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In the next chapter, we are going to introduce the HttpFoundation Component
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and see what it brings us.
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.. _`Symfony2`: http://symfony.com/
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.. _`documentation`: http://symfony.com/doc

‎book/part02.rst

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@@ -15,8 +15,8 @@ framework from scratch.
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developers; the Internet has already plenty of good resources on that
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topic.
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Even if the "application" we wrote yesterday was simple enough, it suffers
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from a few problems::
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Even if the "application" we wrote in the previous chapter was simple enough,
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it suffers from a few problems::
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<?php
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At this point, if you are not convinced that security and testing are indeed
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two very good reasons to stop writing code the old way and adopt a framework
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instead (whatever adopting a framework means in this context), you can stop
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reading this series now and go back to whatever code you were working on
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before.
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reading this book now and go back to whatever code you were working on before.
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.. note::
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I've almost forgot to talk about one added benefit: using the HttpFoundation
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component is the start of better interoperability between all frameworks and
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applications using it (as of today `Symfony2`_, `Drupal 8`_, `phpBB 4`_,
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`Silex`_, `Midgard CMS`_, `Zikula`_ ...).
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`ezPublish 5`, `Silex`_, `Midgard CMS`_, `Zikula`_ ...).
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.. _`Twig`: http://twig.sensiolabs.com/
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.. _`Symfony2 versus Flat PHP`: http://symfony.com/doc/current/book/from_flat_php_to_symfony2.html

‎book/part04.rst

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The Routing Component
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=====================
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Before we start with today's topic, let's refactor our current framework just
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a little to make templates even more readable::
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Before we start diving into the Routing component, let's refactor our current
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framework just a little to make templates even more readable::
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<?php
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‎book/part08.rst

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Unit Testing
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============
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Some watchful readers pointed out some subtle but nonetheless important bugs
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in the framework we have built yesterday. When creating a framework, you must
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be sure that it behaves as advertised. If not, all the applications based on
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it will exhibit the same bugs. The good news is that whenever you fix a bug,
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you are fixing a bunch of applications too.
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You might have noticed some subtle but nonetheless important bugs in the
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framework we built in the previous chapter. When creating a framework, you
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must be sure that it behaves as advertised. If not, all the applications based
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on it will exhibit the same bugs. The good news is that whenever you fix a
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bug, you are fixing a bunch of applications too.
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Today's mission is to write unit tests for the framework we have created by
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using `PHPUnit`_. Create a PHPUnit configuration file in
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.. note::
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I do not explain how the code works in details as this is not the goal of
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this series, but if you don't understand what the hell is going on, I
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highly recommend you to read PHPUnit documentation on `test doubles`_.
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this book, but if you don't understand what the hell is going on, I highly
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recommend you to read PHPUnit documentation on `test doubles`_.
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After the test ran, you should see a green bar. If not, you have a bug
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either in the test or in the framework code!

‎book/part09.rst

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events as needed.
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To make your framework truly flexible, don't hesitate to add more events; and
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to make it more awesome out of the box, add more listeners. Again, this series
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to make it more awesome out of the box, add more listeners. Again, this book
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is not about creating a generic framework, but one that is tailored to your
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needs. Stop whenever you see fit, and further evolve the code from there.
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‎book/part10.rst

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The HttpKernel Component: HttpKernelInterface
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=============================================
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In the conclusion of the second part of this series, I've talked about one
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In the conclusion of the second chapter of this book, I've talked about one
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great benefit of using the Symfony2 components: the *interoperability* between
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all frameworks and applications using them. Let's do a big step towards this
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goal by making our framework implement ``HttpKernelInterface``::

‎book/part11.rst

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==============================================
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If you were to use our framework right now, you would probably have to add
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support for custom error messages. Right now, we have 404 and 500 error
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support but the responses are hardcoded in the framework itself. Making them
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customizable is easy enough though: dispatch a new event and listen to it.
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Doing it right means that the listener has to call a regular controller. But
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what if the error controller throws an exception? You will end up in an
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infinite loop. There should be an easier way, right?
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support for custom error messages. We do have 404 and 500 error support but
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the responses are hardcoded in the framework itself. Making them customizable
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is easy enough though: dispatch a new event and listen to it. Doing it right
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means that the listener has to call a regular controller. But what if the
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error controller throws an exception? You will end up in an infinite loop.
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There should be an easier way, right?
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Enter the ``HttpKernel`` class. Instead of solving the same problem over and
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over again and instead of reinventing the wheel each time, the ``HttpKernel``

‎book/part12.rst

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The DependencyInjection Component
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=================================
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In the last installment of this series, we have emptied the
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``Simplex\Framework`` class by extending the ``HttpKernel`` class from
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the eponymous component. Seeing this empty class, you might be tempted to move
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some code from the front controller to it::
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In the previous chapter, we emptied the ``Simplex\Framework`` class by
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extending the ``HttpKernel`` class from the eponymous component. Seeing this
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empty class, you might be tempted to move some code from the front controller
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to it::
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<?php
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your framework. If you don't like it, don't use it. It's your framework, not
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mine.
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This is (already) the last part of my series on creating a framework on top of
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the Symfony2 components. I'm aware that many topics have not been covered in
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great details, but hopefully it gives you enough information to get started on
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your own and to better understand how the Symfony2 framework works internally.
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This is (already) the last chapter of this book on creating a framework on top
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of the Symfony2 components. I'm aware that many topics have not been covered
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in great details, but hopefully it gives you enough information to get started
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on your own and to better understand how the Symfony2 framework works
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internally.
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If you want to learn more, I highly recommend you to read the source code of
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the `Silex`_ micro-framework, and especially its `Application`_ class.

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