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Commit c34b0bf

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Removed the deprecated class_loader component
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‎_build/redirection_map

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/components/browser_kit/introduction /components/browser_kit
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/components/class_loader/introduction /components/class_loader
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/components/class_loader/index /components/class_loader
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/components/class_loader/cache_class_loader /components/class_loader
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/components/class_loader/class_loader /components/class_loader
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/components/class_loader/class_map_generator /components/class_loader
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/components/class_loader/debug_class_loader /components/class_loader
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/components/class_loader/map_class_loader /components/class_loader
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/components/class_loader/map_class_loader /components/class_loader
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/components/class_loader/psr4_class_loader /components/class_loader
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/components/config/introduction /components/config
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/components/config/index /components/config
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/components/console/helpers/tablehelper /components/console/helpers/table

‎components/class_loader.rst

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The ClassLoader Component
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=========================
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The ClassLoader component provides tools to autoload your classes and
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cache their locations for performance.
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.. caution::
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The ClassLoader component was deprecated in Symfony 3.3 and it will be
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removed in 4.0. As an alternative, use any of the `class loading optimizations`_
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provided by Composer.
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Usage
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-----
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Whenever you reference a class that has not been required or included yet,
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PHP uses the `autoloading mechanism`_ to delegate the loading of a file
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defining the class. Symfony provides three autoloaders, which are able to
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load your classes:
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* :doc:`/components/class_loader/class_loader`: loads classes that follow
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the `PSR-0`_ class naming standard;
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* :doc:`/components/class_loader/psr4_class_loader`: loads classes that follow
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the `PSR-4`_ class naming standard;
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* :doc:`/components/class_loader/map_class_loader`: loads classes using
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a static map from class name to file path.
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Additionally, the Symfony ClassLoader component ships with a wrapper class
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which makes it possible
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:doc:`to cache the results of a class loader </components/class_loader/cache_class_loader>`.
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When using the :doc:`Debug component </components/debug>`, you
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can also use a special :ref:`DebugClassLoader <component-debug-class-loader>`
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that eases debugging by throwing more helpful exceptions when a class could
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not be found by a class loader.
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Installation
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------------
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You can install the component in 2 different ways:
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* :doc:`Install it via Composer </components/using_components>` (``symfony/class-loader``
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on `Packagist`_);
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* Use the official Git repository (https://github.com/symfony/class-loader).
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.. include:: /components/require_autoload.rst.inc
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Learn More
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----------
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.. toctree::
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:glob:
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:maxdepth: 1
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class_loader/class_loader
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class_loader/class_map_generator.rst
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class_loader/debug_class_loader.rst
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class_loader/map_class_loader.rst
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class_loader/psr4_class_loader.rst
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.. toctree::
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:hidden:
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class_loader/cache_class_loader
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The ClassLoader component was removed in Symfony 4.0. As an alternative, use
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any of the `class loading optimizations`_ provided by Composer.
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.. _PSR-0: http://www.php-fig.org/psr/psr-0/
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.. _PSR-4: http://www.php-fig.org/psr/psr-4/
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.. _`autoloading mechanism`: http://php.net/manual/en/language.oop5.autoload.php
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.. _Packagist: https://packagist.org/packages/symfony/class-loader
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.. _`class loading optimizations`: https://getcomposer.org/doc/articles/autoloader-optimization.md

‎components/class_loader/cache_class_loader.rst

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‎components/class_loader/class_loader.rst

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‎components/class_loader/class_map_generator.rst

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‎components/class_loader/debug_class_loader.rst

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‎components/class_loader/map_class_loader.rst

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