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 | Code | Documentation |
|---|---|---|---|
| Asset | Manages URL generation and versioning of web assets such as CSS stylesheets, JavaScript files and image files. | Code | Documentation |
| BrowserKit | Simulates the behavior of a web browser. | Code | Documentation |
| Cache | Implements PSR-6 and PSR-16 caching mechanisms and provides adapters for popular caching backends (Redis, Memcache, APCu, etc.) | Code | Documentation |
| ClassLoader | Loads your project classes automatically if they follow some standard PHP conventions. | Code | Documentation |
| Config | Helps you find, load, combine, autofill and validate configuration values. | Code | Documentation |
| Console | Eases the creation of beautiful and testable command line interfaces. | Code | Documentation |
| CssSelector | Converts CSS selectors to XPath expressions. | Code | Documentation |
| Debug | Provides tools to ease debugging PHP code. | Code | Documentation |
| DependencyInjection | Allows you to standardize and centralize the way objects are constructed in your application. | Code | Documentation |
| Dotenv | Parses .env files to make environment variables stored in them accessible via getenv(), $_ENV or $_SERVER. | Code | Documentation |
| DomCrawler | Eases DOM navigation for HTML and XML documents. | Code | Documentation |
| EventDispatcher | Implements the Mediator pattern in a simple and effective way to make projects truly extensible. | Code | Documentation |
| ExpressionLanguage | Provides an engine that can compile and evaluate expressions. | Code | Documentation |
| Filesystem | Provides basic utilities for the filesystem. | Code | Documentation |
| Finder | Finds files and directories via an intuitive fluent interface. | Code | Documentation |
| Form | Provides tools to easy creating, processing and reusing HTML forms. | Code | Documentation |
| 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 | Documentation |
| HttpKernel | Provides the building blocks to create flexible and fast HTTP-based frameworks. | Code | Documentation |
| 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 | Documentation |
| Ldap | Provides an LDAP client for PHP on top of PHP's ldap extension. | Code | Documentation |
| 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 | Documentation |
| OptionsResolver | Helps you configuring objects with option arrays. | Code | Documentation |
| Process | Executes commands in sub-processes. | Code | Documentation |
| PropertyAccess | Provides function to read and write from/to an object or array using a simple string notation. | Code | Documentation |
| PropertyInfo | Extracts information about the properties of PHP classes using metadata of popular sources (Doctrine, PHP Reflection, PHPdoc, etc.) | Code | Documentation |
| Routing | Maps an HTTP request to a set of configuration variables. | Code | Documentation |
| Security | Provides an infrastructure for sophisticated authorization systems. | Code | Documentation |
| Serializer | Turns objects into a specific format (XML, JSON, Yaml, ...) and the other way around. | Code | Documentation |
| Stopwatch | Provides a way to profile code. | Code | Documentation |
| Templating | Provides all the tools needed to build any kind of template system. | Code | Documentation |
| Translation | Provides tools to internationalize your application. | Code | Documentation |
| Validator | Provides tools to validate classes. | Code | Documentation |
| VarDumper | Provides mechanisms for walking through any arbitrary PHP variable. | Code | Documentation |
| Workflow | Provides tools for managing a workflow or finite state machine. | Code | Documentation |
| Yaml | Loads and dumps YAML files. | Code | Documentation |
| PHPUnit Bridge | The PHPUnit Bridge provides utilities to report legacy tests and usage of deprecated code and a helper for time-sensitive tests. | Code | Documentation |
| Polyfill APCu | Provides apcu_* functions and the APCUIterator class to users of the legacy APC extension. | Code | - |
| Polyfill PHP 5.4 | Provides functions unavailable in releases prior to PHP 5.4. | Code | - |
| Polyfill PHP 5.5 | Provides functions unavailable in releases prior to PHP 5.5. | Code | - |
| Polyfill PHP 5.6 | Provides functions unavailable in releases prior to PHP 5.6. | Code | - |
| Polyfill PHP 7.0 | Provides functions unavailable in releases prior to PHP 7.0. | Code | - |
| Polyfill PHP 7.1 | Provides functions unavailable in releases prior to PHP 7.1. | Code | - |
| Polyfill Iconv | Provides a native PHP implementation of the php.net/iconv functions. | Code | - |
| Polyfill Intl Grapheme | Provides a partial, native PHP implementation of the Grapheme functions from the Intl extension. | Code | - |
| Polyfill Intl ICU | Provides a collection of functions/classes using the symfony/intl package when the Intl extension is not installed. | Code | - |
| Polyfill Intl Normalizer | Provides a fallback implementation for the Normalizer class provided by the Intl extension. | Code | - |
| Polyfill Mbstring | Provides a partial, native PHP implementation for the Mbstring extension. | Code | - |
| 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 | - |