51. Polyfill UtilThis component provides binary-safe string functions, using the mbstring extension when available.
54. Polyfill Php54This component provides functions unavailable in releases prior to PHP 5.4.
55. Web Server BundleWebServerBundle provides commands for running applications using the PHP built-in web server. It simplifies your local development setup because you don't have to configure a proper web server such as Apache or Nginx to run your application.
57. Security CoreSecurity provides an infrastructure for sophisticated authorization systems, which makes it possible to easily separate the actual authorization logic from so called user providers that hold the users credentials. It is inspired by the Java Spring framework.
58. Security CsrfThe Security CSRF (cross-site request forgery) component provides a class CsrfTokenManager for generating and validating CSRF tokens.
59. SecurityThe Security component provides a complete security system for your web application.
60. ConsoleThe Console component eases the creation of beautiful and testable command line interfaces.
61. Http ClientThe HttpClient component provides powerful methods to fetch HTTP resources synchronously or asynchronously.
62. Security GuardThe Guard component brings many layers of authentication together, making it much easier to create complex authentication systems where you have total control.
63. Security HttpSecurity provides an infrastructure for sophisticated authorization systems, which makes it possible to easily separate the actual authorization logic from so called user providers that hold the users credentials. It is inspired by the Java Spring framework.
64. Class Loader[DEPRECATED] The ClassLoader component provides tools to autoload your classes and cache their locations for performance.
67. DiversityThis is the repository of the Symfony diversity initiative.
68. Web LinkThe WebLink component manages links between resources. It is particularly useful to advise clients to preload and prefetch documents through HTTP and HTTP/2 pushes.
69. Http FoundationThe HttpFoundation component defines an object-oriented layer for the HTTP specification.
71. Event DispatcherThe EventDispatcher component provides tools that allow your application components to communicate with each other by dispatching events and listening to them.
73. FinderThe Finder component finds files and directories via an intuitive fluent interface.
75. RoutingThe Routing component maps an HTTP request to a set of configuration variables.
77. Polyfill XmlThis polyfill is deprecated. Use the symfony/polyfill-php72 package instead.
78. ProcessThe Process component executes commands in sub-processes.
79. Css SelectorThe CssSelector component converts CSS selectors to XPath expressions.
82. Var DumperThe VarDumper component provides mechanisms for walking through any arbitrary PHP variable. It provides a better dump() function that you can use instead of var_dump().
83. Polyfill Php80This component provides functions unavailable in releases prior to PHP 8.0.
86. TranslationThe Translation component provides tools to internationalize your application.
88. StringProvides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way.
90. Polyfill Intl GraphemeThis component provides a partial, native PHP implementation of the Grapheme functions from the Intl extension.
91. Polyfill ApcuThis component provides apcu_* functions and the APCUIterator class to users of the legacy APC extension.
93. MailerThe Mailer component helps sending emails
94. MessengerThe Messenger component helps application send and receive messages to/from other applications or via message queues.
98. WorkflowThe Workflow component provides tools for managing a workflow or finite state machine.
100. FilesystemThe Filesystem component provides basic utilities for the filesystem.