Symfony is a PHP framework and set of reusable PHP components. It includes a framework for building web applications, PHP components that can be used separately from the framework, and a large community. The document provides overviews of the major parts of Symfony, including the framework, components, documentation resources, demo application, and request/response workflow.

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SYMFONY
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SYMFONY
‣ Symfony is a set of reusable PHP components...
‣ ... and a PHP framework for web projects
‣ Symfony is a set of PHP Components, a Web
Application framework, a Philosophy, and a
Community — all working together in harmony.
‣ https://symfony.com/
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‣ Symfony Framework
‣ The leading PHP framework to create websites and web applications.
Built on top of the Symfony Components.
‣ Symfony Components
‣ A set of decoupled and reusable components on which the best PHP
applications are built, such as Drupal, phpBB, and eZ Publish.
‣ Symfony Community
‣ A huge community of Symfony fans committed to take PHP to the next
level.
‣ Symfony Philosophy
‣ Embracing and promoting professionalism, best practices,
standardization and interoperability of applications.
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SYMFONY DOCUMENTATION
‣ https://symfony.com/doc/current/index.html
‣ Symfony Book
‣ https://symfony.com/pdf/Symfony_book_2.8.pdf
‣ Symfony Quick Tour
‣ https://symfony.com/pdf/Symfony_quick_tour_3.4.pdf
‣ Symfony Cookbook
‣ https://symfony.com/pdf/Symfony_cookbook_2.8.pdf
‣ Symfony Getting Started
‣ https://symfony.com/pdf/Symfony_getting_started_3.4.pdf
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SYMFONY DEMO APPLICATION
‣ https://github.com/symfony/symfony-demo
‣ The "Symfony Demo Application" is a reference
application created to show how to develop Symfony
applications following the recommended best
practices.
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SYMFONY COMPONENTS
‣ Symfony Components are a set of decoupled and
reusable PHP libraries. They are becoming the standard
foundation on which the best PHP applications are built
on. You can use any of these components in your own
applications independently from the Symfony
Framework.
‣ https://symfony.com/components
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SYMFONY COMPONENTS
‣ Asset Manages URL generation and versioning of web assets such as CSS stylesheets, JavaScript
files and image files.
‣ BrowserKit Simulates the behavior of a web browser.
‣ Cache Implements PSR-6 and PSR-16 caching mechanisms and provides adapters for popular
caching backends (Redis, Memcache, APCu, etc.)
‣ ClassLoader Loads your project classes automatically if they follow some standard PHP conventions.
‣ Config Helps you find, load, combine, autofill and validate configuration values.
‣ Console Eases the creation of beautiful and testable command line interfaces.
‣ CssSelector Converts CSS selectors to XPath expressions.
‣ Debug Provides tools to ease debugging PHP code.
‣ DependencyInjection Allows you to standardize and centralize the way objects are constructed in
your application.
‣ Dotenv Parses .env files to make environment variables stored in them accessible via getenv(),
$_ENV or $_SERVER.
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SYMFONY COMPONENTS
‣ DomCrawler Eases DOM navigation for HTML and XML documents.
‣ EventDispatcher Implements the Mediator pattern in a simple and effective way to make
projects truly extensible.
‣ ExpressionLanguage Provides an engine that can compile and evaluate expressions.
‣ Filesystem Provides basic utilities for the filesystem.
‣ Finder Finds files and directories via an intuitive fluent interface.
‣ Form Provides tools to easy creating, processing and reusing HTML forms.
‣ Guard Brings many layers of authentication together, making it much easier to create
complex authentication systems where you have total control.
‣ HttpFoundation Defines an object-oriented layer for the HTTP specification.
‣ HttpKernelProvides the building blocks to create flexible and fast HTTP-based
frameworks.
‣ Icu Contains the data of the ICU library in a specific version. This component is deprecated
since October 2014, use the Intl component instead.
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SYMFONY COMPONENTS
‣ Intl Provides fallback code to handle cases when the intl extension is missing.
‣ Ldap Provides an LDAP client for PHP on top of PHP's ldap extension.
‣ Locale Provides fallback code to handle cases when the intl extension is missing. This
component is deprecated since 2.3, use the Intl component instead.
‣ Lock Creates and manages locks, a mechanism to provide exclusive access to a shared
resource.
‣ OptionsResolver Helps you configuring objects with option arrays.
‣ Process Executes commands in sub-processes.
‣ PropertyAccess Provides function to read and write from/to an object or array using a
simple string notation.
‣ PropertyInfo Extracts information about the properties of PHP classes using metadata of
popular sources (Doctrine, PHP Reflection, PHPdoc, etc.)
‣ Routing Maps an HTTP request to a set of configuration variables.
‣ Security Provides an infrastructure for sophisticated authorization systems.
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SYMFONY COMPONENTS
‣ Serializer Turns objects into a specific format (XML, JSON, Yaml, ...) and the other way
around.
‣ Stopwatch Provides a way to profile code.
‣ Templating Provides all the tools needed to build any kind of template system.
‣ Translation Provides tools to internationalize your application.
‣ Validator Provides tools to validate classes.
‣ VarDumper Provides mechanisms for walking through any arbitrary PHP variable.
‣ WebLink Implements HTML5 Links, Preload and Resource Hints specifications to advise
clients (browsers) to preload and prefetch documents through HTTP and HTTP/2 pushes.
‣ Workflow Provides tools for managing a workflow or finite state machine.
‣ Yaml Loads and dumps YAML files.
‣ PHPUnit Bridge The PHPUnit Bridge provides utilities to report legacy tests and usage of
deprecated code and a helper for time-sensitive tests.
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SYMFONY COMPONENTS
‣ Polyfill APCu Provides apcu_* functions and the APCUIterator class to users of the legacy APC
extension.
‣ Polyfill PHP X.x Provides functions unavailable in releases prior to PHP X.x.
‣ Polyfill Iconv Provides a native PHP implementation of the php.net/iconv functions.
‣ Polyfill Intl Grapheme Provides a partial, native PHP implementation of the Grapheme
functions from the Intl extension.
‣ Polyfill Intl ICU Provides a collection of functions/classes using the symfony/intl package when
the Intl extension is not installed.
‣ Polyfill Intl Normalizer Provides a fallback implementation for the Normalizer class provided
by the Intl extension.
‣ Polyfill Mbstring Provides a partial, native PHP implementation for the Mbstring extension.
‣ Polyfill Util Provides binary-safe string functions, using the mbstring extension when available.
‣ Polyfill Xml Provides a fallback implementation for the following functions in the abscense of
the XML extension.
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SYMFONY REQUEST AND RESPONSE WORKFLOW
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SYMFONY REQUEST
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SYMFONY RESPONSE
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SYMFONY APPLICATION FLOW
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SYMFONY CONTROLLER
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SYMFONY TWIG TEMPLATE
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SYMFONY TWIG TEMPLATE NAMING AND LOCATIONS
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SYMFONY ENTITY
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SYMFONY ENTITY MAPPING WITH DOCTRINE
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SYMFONY ENTITY MAPPING WITH DOCTRINE
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SYMFONY BUNDLE
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SYMFONY BUNDLE DIRECTORY STRUCTURE
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SYMFONY DEMO
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SYMFONY DEMO
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SYMFONY PROFILER
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