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.

Installation

Use Composer to install any of the Symfony Components in your PHP project:

$ composer require

Component List

Component	Description	Resources
Asset	Manages URL generation and versioning of web assets such as CSS stylesheets, JavaScript files and image files.	Code Docs
BrowserKit	Simulates the behavior of a web browser.	Code Docs
Cache	Implements PSR-6 and PSR-16 caching mechanisms and provides adapters for popular caching backends (Redis, Memcache, APCu, etc.)	Code Docs
ClassLoader	Loads your project classes automatically if they follow some standard PHP conventions.	Code Docs
Config	Helps you find, load, combine, autofill and validate configuration values.	Code Docs
Console	Eases the creation of beautiful and testable command line interfaces.	Code Docs
Contracts	A set of abstractions extracted out of the Symfony components.	Code Docs
CssSelector	Converts CSS selectors to XPath expressions.	Code Docs
Debug	Provides tools to ease debugging PHP code.	Code Docs
DependencyInjection	Allows you to standardize and centralize the way objects are constructed in your application.	Code Docs
DomCrawler	Eases DOM navigation for HTML and XML documents.	Code Docs
Dotenv	Parses .env files to make environment variables stored in them accessible via getenv(), $_ENV or $_SERVER.	Code Docs
EventDispatcher	Implements the Mediator pattern in a simple and effective way to make projects truly extensible.	Code Docs
ExpressionLanguage	Provides an engine that can compile and evaluate expressions.	Code Docs
Filesystem	Provides basic utilities for the filesystem.	Code Docs
Finder	Finds files and directories via an intuitive fluent interface.	Code Docs
Form	Provides tools to easy creating, processing and reusing HTML forms.	Code Docs
Guard	Brings many layers of authentication together, making it much easier to create complex authentication systems where you have total control.	Code
HttpFoundation	Defines an object-oriented layer for the HTTP specification.	Code Docs
HttpKernel	Provides the building blocks to create flexible and fast HTTP-based frameworks.	Code Docs
Icu	Contains the data of the ICU library in a specific version. This component is deprecated since October 2014, use the Intl component instead.	Code
Intl	Provides fallback code to handle cases when the intl extension is missing.	Code Docs
Ldap	Provides an LDAP client for PHP on top of PHP's ldap extension.	Code Docs
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.	Code Docs
Lock	Creates and manages locks, a mechanism to provide exclusive access to a shared resource.	Code Docs
Messenger	Helps applications send and receive messages to/from other applications or via message queues.	Code Docs
OptionsResolver	Helps you configuring objects with option arrays.	Code Docs
PHPUnit Bridge	Provides utilities to report legacy tests and usage of deprecated code and a helper for time-sensitive tests.	Code Docs
Polyfill APCu	Provides apcu_* functions and the APCUIterator class to users of the legacy APC extension.	Code Docs
Polyfill Ctype	Provides a partial, native PHP implementation for the ctype extension.	Code Docs
Polyfill Iconv	Provides a native PHP implementation of the php.net/iconv functions.	Code Docs
Polyfill Intl Grapheme	Provides a partial, native PHP implementation of the Grapheme functions from the Intl extension.	Code Docs
Polyfill Intl ICU	Provides a collection of functions/classes using the symfony/intl package when the Intl extension is not installed.	Code Docs
Polyfill Intl Normalizer	Provides a fallback implementation for the Normalizer class provided by the Intl extension.	Code Docs
Polyfill Mbstring	Provides a partial, native PHP implementation for the Mbstring extension.	Code Docs
Polyfill PHP 5.4	Provides functions unavailable in releases prior to PHP 5.4.	Code Docs
Polyfill PHP 5.5	Provides functions unavailable in releases prior to PHP 5.5.	Code Docs
Polyfill PHP 5.6	Provides functions unavailable in releases prior to PHP 5.6.	Code Docs
Polyfill PHP 7.0	Provides functions unavailable in releases prior to PHP 7.0.	Code Docs
Polyfill PHP 7.1	Provides functions unavailable in releases prior to PHP 7.1.	Code Docs
Polyfill PHP 7.2	Provides functions unavailable in releases prior to PHP 7.2.	Code Docs
Polyfill PHP 7.3	Provides functions unavailable in releases prior to PHP 7.3.	Code Docs
Polyfill Util	Provides binary-safe string functions, using the mbstring extension when available.	Code
Polyfill Xml	Provides a fallback implementation for the following functions in the abscense of the XML extension.	Code
Process	Executes commands in sub-processes.	Code Docs
PropertyAccess	Provides function to read and write from/to an object or array using a simple string notation.	Code Docs
PropertyInfo	Extracts information about the properties of PHP classes using metadata of popular sources (Doctrine, PHP Reflection, PHPdoc, etc.)	Code Docs
Routing	Maps an HTTP request to a set of configuration variables.	Code Docs
Security	Provides an infrastructure for sophisticated authorization systems.	Code Docs
Serializer	Turns objects into a specific format (XML, JSON, Yaml, ...) and the other way around.	Code Docs
Stopwatch	Provides a way to profile code.	Code Docs
Templating	Provides all the tools needed to build any kind of template system.	Code Docs
Translation	Provides tools to internationalize your application.	Code Docs
Validator	Provides tools to validate classes.	Code Docs
VarDumper	Provides mechanisms for walking through any arbitrary PHP variable.	Code Docs
WebLink	Implements HTML5 Links, Preload and Resource Hints specifications to advise clients (browsers) to preload and prefetch documents through HTTP and HTTP/2 pushes.	Code Docs
Workflow	Provides tools for managing a workflow or finite state machine.	Code Docs
Yaml	Loads and dumps YAML files.	Code Docs