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removed usage of the ClassLoader component in favor of Composer
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‎book/part01.rst‎

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@@ -64,9 +64,9 @@ Propel, or plain-old PDO for the Model; PHP or Twig for the View).
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When creating a framework, following the MVC pattern is not the right goal.
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The main goal should be the Separation of Concerns; I actually think that this
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is the only design pattern that you should really care about. The fundamental
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principles of the Symfony2 Components are centered around the HTTP
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specification. As such, the frameworks that we are going to create should be
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more accurately labelled as HTTP frameworks or Request/Response frameworks.
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principles of the Symfony2 Components are focused on the HTTP specification.
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As such, the frameworks that we are going to create should be more accurately
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labelled as HTTP frameworks or Request/Response frameworks.
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Before we start
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---------------
@@ -97,20 +97,18 @@ Components Installation
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~~~~~~~~~~~~~~~~~~~~~~~
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To install the Symfony2 Components that we need for our framework, we are
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going to use `Composer`_, a project dependency manager for PHP. First, list
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your dependencies in a ``composer.json`` file:
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going to use `Composer`_, a project dependency manager for PHP. Create a
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``composer.json`` file, where we will list our dependencies:
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.. code-block:: javascript
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{
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"require": {
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"symfony/class-loader": "2.1.*"
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}
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}
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Here, we tell Composer that our project depends on the Symfony2 ClassLoader
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component, version 2.1.0 or later. To actually install the project
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dependencies, download the composer binary and run it:
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The file is empty for now as we do not depend on anything yet. To install the
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project dependencies, download the composer binary and run it:
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.. code-block:: sh
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@@ -121,13 +119,7 @@ dependencies, download the composer binary and run it:
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$ php composer.phar install
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After running the ``install`` command, you must see a new ``vendor/``
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directory that must contain the Symfony2 ClassLoader code.
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.. note::
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Even if we highly recommend you the use of Composer, you can also download
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the archives of the components directly or use Git submodules. That's
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really up to you.
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directory.
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Naming Conventions and Autoloading
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -137,42 +129,8 @@ require the file where a class is defined before being able to use it. But
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with some conventions, we can just let PHP do the hard work for us.
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Symfony2 follows the de-facto PHP standard, `PSR-0`_, for class names and
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autoloading. The Symfony2 ClassLoader Component provides an autoloader that
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implements this PSR-0 standard and most of the time, the Symfony2 ClassLoader
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is all you need to autoload all your project classes.
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Create an empty autoloader in a new ``autoload.php`` file:
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.. code-block:: php
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<?php
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// framework/autoload.php
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require_once __DIR__.'/vendor/symfony/class-loader/Symfony/Component/ClassLoader/UniversalClassLoader.php';
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use Symfony\Component\ClassLoader\UniversalClassLoader;
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$loader = new UniversalClassLoader();
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$loader->register();
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You can now run the ``autoload.php`` on the CLI, it should not do anything and
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should not throw any error:
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.. code-block:: sh
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$ php autoload.php
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.. tip::
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The Symfony website has more information about the `ClassLoader`_
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component.
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.. note::
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Composer automatically creates an autoloader for all your installed
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dependencies; instead of using the ClassLoader component, you can also
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just require ``vendor/.composer/autoload.php``.
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autoloading and Composer generates such an autoloader for all the dependencies
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it manages; it can be enabled by requiring the ``vendor/autoload.php`` file.
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Our Project
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-----------
@@ -183,6 +141,8 @@ start with the simplest web application we can think of in PHP::
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<?php
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// framework/index.php
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$input = $_GET['name'];
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printf('Hello %s', $input);

‎book/part02.rst‎

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@@ -1,12 +1,12 @@
11
The HttpFoundation Component
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============================
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Before we dive into the code refactoring, I first want to step back and take a
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look at why you would like to use a framework instead of keeping your
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plain-old PHP applications as is. Why using a framework is actually a good
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idea, even for the simplest snippet of code and why creating your framework on
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top of the Symfony2 components is better than creating a framework from
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scratch.
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Before diving into the framework creation process, I first want to step back
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and take a look at why you would like to use a framework instead of keeping
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your plain-old PHP applications as is. Why using a framework is actually a
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good idea, even for the simplest snippet of code and why creating your
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framework on top of the Symfony2 components is better than creating a
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framework from scratch.
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.. note::
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@@ -106,8 +106,7 @@ Going OOP with the HttpFoundation Component
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-------------------------------------------
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Writing web code is about interacting with HTTP. So, the fundamental
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principles of our framework should be centered around the `HTTP
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specification`_.
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principles of our framework should be around the `HTTP specification`_.
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The HTTP specification describes how a client (a browser for instance)
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interacts with a server (our application via a web server). The dialog between
@@ -131,7 +130,6 @@ dependency for the project:
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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*"
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}
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}
@@ -142,23 +140,14 @@ Then, run the composer ``update`` command:
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$ php composer.phar update
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Finally, at the bottom of the ``autoload.php`` file, add the code needed to
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autoload the component::
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<?php
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// framework/autoload.php
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$loader->registerNamespace('Symfony\\Component\\HttpFoundation', __DIR__.'/vendor/symfony/http-foundation');
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Now, let's rewrite our application by using the ``Request`` and the
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``Response`` classes::
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<?php
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// framework/index.php
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require_once __DIR__.'/autoload.php';
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require_once __DIR__.'/vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;

‎book/part03.rst‎

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@@ -9,7 +9,7 @@ goodbye::
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// framework/bye.php
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require_once __DIR__.'/autoload.php';
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require_once __DIR__.'/vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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// framework/init.php
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require_once __DIR__.'/autoload.php';
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require_once __DIR__.'/vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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// framework/front.php
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require_once __DIR__.'/autoload.php';
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require_once __DIR__.'/vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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example.com
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├── composer.json
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│ src
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│ ├── autoload.php
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│ └── pages
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│ ├── hello.php
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│ └── bye.php
@@ -212,7 +211,7 @@ We have our framework for today::
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// example.com/web/front.php
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require_once __DIR__.'/../src/autoload.php';
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require_once __DIR__.'/../vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;

‎book/part04.rst‎

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@@ -8,7 +8,7 @@ a little to make templates even more readable::
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// example.com/web/front.php
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require_once __DIR__.'/../src/autoload.php';
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require_once __DIR__.'/../vendor/autoload.php';
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use Symfony\Component\HttpFoundation\Request;
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use Symfony\Component\HttpFoundation\Response;
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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*",
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"symfony/routing": "2.1.*"
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}
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}
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From now on, we are going to use the generated Composer autoloader instead of
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our own ``autoload.php``. Remove the ``autoload.php`` file and replace its
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reference in ``front.php``::
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<?php
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// example.com/web/front.php
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require_once __DIR__.'/../vendor/autoload.php';
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// ...
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Instead of an array for the URL map, the Routing component relies on a
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``RouteCollection`` instance::
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‎book/part06.rst‎

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@@ -41,7 +41,6 @@ component::
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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*",
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"symfony/routing": "2.1.*",
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"symfony/http-kernel": "2.1.*"

‎book/part07.rst‎

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@@ -89,7 +89,6 @@ be autoloaded, update the ``composer.json`` file:
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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*",
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"symfony/routing": "2.1.*",
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"symfony/http-kernel": "2.1.*"

‎book/part08.rst‎

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@@ -24,7 +24,7 @@ using `PHPUnit`_. Create a PHPUnit configuration file in
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processIsolation="false"
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stopOnFailure="false"
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syntaxCheck="false"
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bootstrap="vendor/.composer/autoload.php"
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bootstrap="vendor/autoload.php"
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>
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<testsuites>
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<testsuite name="Test Suite">

‎book/part09.rst‎

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@@ -21,7 +21,6 @@ version of this pattern:
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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*",
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"symfony/routing": "2.1.*",
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"symfony/http-kernel": "2.1.*",

‎book/part12.rst‎

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{
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"require": {
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"symfony/class-loader": "2.1.*",
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"symfony/http-foundation": "2.1.*",
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"symfony/routing": "2.1.*",
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"symfony/http-kernel": "2.1.*",

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