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TYPO3 Explained
Release: 11.5

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  • Introduction
  • API A-Z
    • Assets
    • Authentication
      • Multi-factor authentication
    • Autoloading
      • ComposerClassLoader
    • Backend APIs
      • Access control in the backend (users and groups)
        • Users and groups
        • Password reset functionality
        • Roles
        • Access Control Options
        • Other Options
        • More about file mounts
        • Backend users module
      • Ajax in the Backend
      • Ajax in the backend, client-side
      • Backend layout
      • Backend routing
      • Backend user object
      • Broadcast channels
      • Clipboard
      • Context-sensitive menus
      • Using Custom Permission Options
      • Backend login form API
      • Links to Edit Records
    • Caching
      • Quick Start for Integrators
      • Configuration
      • Caching Framework Architecture
      • Cache frontends
      • Developer Information
    • System categories
    • Commands
      • Tutorial
    • Content Elements & Plugins
      • Introduction
      • Create a custom content element type
      • Custom data processors
      • Create plugins
      • Configure custom backend preview for content element
      • Add content elements to the Content Element Wizard
      • Best practices
    • Context API and aspects
    • Context Sensitive Help (CSH)
      • The $TCA_DESCR Array
      • The Language Files for CSH
      • Implementing CSH
    • Cropping images
      • General Configuration
      • Crop variants configuration per content element
    • Database
      • Introduction
      • Configuration
      • Database structure
      • Upgrade table and field definitions
      • Basic create, read, update, and delete operations (CRUD)
      • Class overview
      • ConnectionPool
      • Query builder
      • Connection
      • Expression builder
      • Restriction builder
      • Result
      • Migrating from TYPO3_DB
      • Various tips and tricks
    • DataHandler
      • Introduction
      • DataHandler basics
      • Using the DataHandler in scripts
      • The "/record/commit" route
    • Debugging
    • Dependency injection
    • Deprecation
    • Directory structure
      • Legacy installations: Directory structure
    • Enumerations & bitsets
      • How to use enumerations
      • How to use bitsets
    • Environment
    • Error and exception handling
      • Configuration
      • Error Handler
      • Production exception handler
      • Debug exception handler
      • Examples
      • How to extend the error and exception handling
    • Events, signals and hooks
      • Extending the TYPO3 Core
      • Event dispatcher (PSR-14 events)
      • Event list
        • Backend
          • AfterFormEnginePageInitializedEvent
          • AfterHistoryRollbackFinishedEvent
          • AfterPageColumnsSelectedForLocalizationEvent
          • BeforeFormEnginePageInitializedEvent
          • BeforeHistoryRollbackStartEvent
          • ModifyClearCacheActionsEvent
          • ModifyPageLayoutOnLoginProviderSelectionEvent
          • SwitchUserEvent
          • SystemInformationToolbarCollectorEvent
        • Core
          • Authentication
            • AfterGroupsResolvedEvent
          • Cache
            • CacheFlushEvent
            • CacheWarmupEvent
          • Configuration
            • AfterTcaCompilationEvent
            • ModifyLoadedPageTsConfigEvent
          • Core
            • BootCompletedEvent
          • Database
            • AlterTableDefinitionStatementsEvent
          • DataHandling
            • AppendLinkHandlerElementsEvent
            • IsTableExcludedFromReferenceIndexEvent
          • Html
            • BrokenLinkAnalysisEvent
          • Mail
            • AfterMailerInitializationEvent
          • Package
            • AfterPackageActivationEvent
            • AfterPackageDeactivationEvent
            • BeforePackageActivationEvent
            • PackagesMayHaveChangedEvent
          • Page
            • BeforeJavaScriptsRenderingEvent
            • BeforeStylesheetsRenderingEvent
          • Resource
            • AfterFileAddedEvent
            • AfterFileAddedToIndexEvent
            • AfterFileCommandProcessedEvent
            • AfterFileContentsSetEvent
            • AfterFileCopiedEvent
            • AfterFileCreatedEvent
            • AfterFileDeletedEvent
            • AfterFileMarkedAsMissingEvent
            • AfterFileMetaDataCreatedEvent
            • AfterFileMetaDataDeletedEvent
            • AfterFileMetaDataUpdatedEvent
            • AfterFileMovedEvent
            • AfterFileProcessingEvent
            • AfterFileRemovedFromIndexEvent
            • AfterFileRenamedEvent
            • AfterFileReplacedEvent
            • AfterFileUpdatedInIndexEvent
            • AfterFolderAddedEvent
            • AfterFolderCopiedEvent
            • AfterFolderDeletedEvent
            • AfterFolderMovedEvent
            • AfterFolderRenamedEvent
            • AfterResourceStorageInitializationEvent
            • BeforeFileAddedEvent
            • BeforeFileContentsSetEvent
            • BeforeFileCopiedEvent
            • BeforeFileCreatedEvent
            • BeforeFileDeletedEvent
            • BeforeFileMovedEvent
            • BeforeFileProcessingEvent
            • BeforeFileRenamedEvent
            • BeforeFileReplacedEvent
            • BeforeFolderAddedEvent
            • BeforeFolderCopiedEvent
            • BeforeFolderDeletedEvent
            • BeforeFolderMovedEvent
            • BeforeFolderRenamedEvent
            • BeforeResourceStorageInitializationEvent
            • EnrichFileMetaDataEvent
            • GeneratePublicUrlForResourceEvent
            • ModifyFileDumpEvent
            • ModifyIconForResourcePropertiesEvent
            • SanitizeFileNameEvent
          • Tree
            • ModifyTreeDataEvent
        • Extbase
          • Mvc
            • AfterRequestDispatchedEvent
            • BeforeActionCallEvent
          • Persistence
            • AfterObjectThawedEvent
            • EntityAddedToPersistenceEvent
            • EntityPersistedEvent
            • EntityRemovedFromPersistenceEvent
            • EntityUpdatedInPersistenceEvent
            • ModifyQueryBeforeFetchingObjectDataEvent
            • ModifyResultAfterFetchingObjectDataEvent
        • ExtensionManager
          • AfterExtensionDatabaseContentHasBeenImportedEvent
          • AfterExtensionFilesHaveBeenImportedEvent
          • AfterExtensionStaticDatabaseContentHasBeenImportedEvent
          • AvailableActionsForExtensionEvent
        • Filelist
          • ProcessFileListActionsEvent
        • Frontend
          • ModifyHrefLangTagsEvent
          • ModifyResolvedFrontendGroupsEvent
        • FrontendLogin
          • BeforeRedirectEvent
          • LoginConfirmedEvent
          • LoginErrorOccurredEvent
          • LogoutConfirmedEvent
          • ModifyLoginFormViewEvent
          • PasswordChangeEvent
          • SendRecoveryEmailEvent
        • Impexp
          • BeforeImportEvent
        • Install
          • ModifyLanguagePackRemoteBaseUrlEvent
        • Linkvalidator
          • BeforeRecordIsAnalyzedEvent
        • Recordlist
          • ModifyRecordListHeaderColumnsEvent
          • ModifyRecordListRecordActionsEvent
          • ModifyRecordListTableActionsEvent
          • RenderAdditionalContentToRecordListEvent
        • Seo
          • ModifyUrlForCanonicalTagEvent
        • Setup
          • AddJavaScriptModulesEvent
        • Workspaces
          • AfterCompiledCacheableDataForWorkspaceEvent
          • AfterDataGeneratedForWorkspaceEvent
          • GetVersionedDataEvent
          • SortVersionedDataEvent
      • Signals and slots (deprecated)
      • Hooks
      • JavaScript Event API
        • Regular event
        • Debounce event
        • Throttle event
        • RequestAnimationFrame event
    • File abstraction
      • Basic concepts
      • Architecture
        • Overview
        • Folders
        • Database structure
        • Components
        • PSR-14 events
      • Administration
        • Permissions
        • File storages
        • Maintenance
      • Using FAL
        • Using FAL in the frontend
        • TCA Definition
        • The StorageRepository class
        • Working with files, folders and file references
        • Working with collections
        • Searching for files
      • File collections
    • Custom file processors
    • Flash messages
    • FlexForms
      • T3DataStructure
        • Elements
        • Sheet References
        • Parsing a Data Structure
    • Fluid
      • ViewHelper reference
      • Introduction to Fluid
      • Fluid syntax
      • Using Fluid in TYPO3
      • cObject ViewHelper
      • Property additionalAttributes
      • Developing a custom ViewHelper
    • FormEngine
      • Introduction
      • Main rendering workflow
      • Data compiling
      • Rendering
    • Form protection tool
    • Global values
      • Constants
    • Icon API
    • JavaScript in TYPO3 Backend
      • RequireJS in the TYPO3 Backend
        • Use RequireJS in your own extension
        • Dependency handling
        • Loading your own or other RequireJS modules
        • Shim Library to Use it as Own RequireJS Modules
      • Client-side templating
      • Various JavaScript modules
        • Modals
        • Multi-step wizard
        • DocumentService (jQuery.ready substitute)
        • SessionStorage wrapper
      • Event Api
      • Navigation via JavaScript
      • JavaScript Form Helpers
    • Link handling
      • Link handler configuration
      • LinkBrowser API
      • The LinkHandler API
        • The PageLinkHandler
        • The RecordLinkHandler
        • Implementing a custom LinkHandler
      • Core link handler
      • Frontend link builder
      • LinkBrowser Tutorials
        • Browse records of a table
        • Create a custom link browser
    • Localization
      • Introduction
      • Supported languages
      • Managing translations
      • Localization API
        • LanguageService
        • LanguageServiceFactory
        • LocalizationUtility (Extbase)
      • Translation servers
        • Localization with Crowdin
          • Extension integration
          • Online translation with Crowdin
          • Workflow
          • Frequently asked questions (FAQ)
        • Custom translation servers
      • XLIFF Format
      • Working with XLIFF files
    • Locking API
    • Logging
      • Quickstart
      • Logger
      • Configuration of the logging system
      • The LogRecord model
      • Log writers
      • Log processors
    • Mail API
    • Mount points
    • Namespaces
    • Page types
      • Introduction
      • Types of pages
      • X-Redirect-By header for pages with redirect types
      • Create new Page Type
    • Pagination
    • Parsing HTML
    • Password hashing
      • Troubleshooting
    • Requests
      • Bootstrapping
      • Middlewares (Request handling)
      • TYPO3 request object
      • TYPO3 request attributes
        • Application type
        • Frontend controller
        • Frontend user
        • Language
        • Normalized parameters
        • Route
        • Routing
        • Site
        • Target
    • Routing
      • Introduction
      • Page based
      • For extensions
      • Extending
      • Examples
    • RTE
      • CKEditor Rich Text Editor
      • Rendering in the Frontend
      • Rich text editors in the TYPO3 backend
        • Introduction
        • Plugging in a custom RTE
      • Rich Text Editors (RTE) in the TYPO3 frontend
        • Including a Rich Text Editor (RTE) in the frontend
      • RTE Transformations
        • Introduction
        • Transformation overview
      • Historical Perspective on RTE Transformations
        • Properties and Transformations
        • RTE Transformations in Content Elements
    • SEO
      • Canonical API
      • MetaTag API
      • Page title API
      • XML sitemap
    • Services
      • Introduction
      • Using Services
        • Service precedence
        • Simple usage
        • Use with subtypes
        • Calling a chain of services
      • Configuration
        • Override service registration
        • Service configuration
        • Service type configuration
      • Developer's Guide
        • Introducing a new service type
        • Implementing a service
        • Service API
        • Services API
    • Sessions
      • User session management
      • Session storage framework
    • Site handling
      • Basics
      • Creation
      • Base variants
      • Adding Languages
      • Error handling
        • Page-based error handler
        • Fluid-based error handler
        • Writing a custom page error handler
      • Static routes
      • Environment variables
      • Usage in TypoScript + Fluid
      • Usage
      • Usage in TCA
      • Site settings
      • Console tools
      • PHP API
      • Extended configuration
    • Soft references
    • Symfony expression language
    • System registry
    • TSFE
    • Versioning and Workspaces
    • XCLASSes
  • Coding guidelines
    • Introduction
    • PHP architecture
      • Services
      • Static Methods, static Classes, Utility Classes
      • Traits
      • Working with exceptions
    • PHP
      • General requirements for PHP files
      • File structure
      • PHP syntax formatting
      • Using phpDoc
    • PHP Best Practice
      • Named arguments
      • Accessing the database
      • Singletons
      • Static methods
      • Unit Tests
      • Handling deprecations
      • Namespaces and class names of user files
    • JavaScript
    • TypeScript
    • TypoScript
    • TSconfig
    • XLIFF
    • YAML
    • reStructuredText
  • Configuration
    • Configuration overview
    • Glossary
    • Configuration files
    • Configuration module
    • Feature toggles
    • $GLOBALS
    • TYPO3_CONF_VARS
      • BE - backend configuration
      • DB - Database connections
      • EXT - Extension manager configuration
      • FE - frontend configuration
      • GFX - graphics configuration
      • HTTP - tune requests
      • LOG - Logging configuration
      • MAIL settings
      • SYS - System configuration
    • TYPO3 information
    • TSconfig
    • TypoScript syntax
      • What Is TypoScript?
      • Syntax
        • Introduction
        • Contexts
        • TypoScript syntax
        • Conditions
        • Includes
      • Sorting out details
        • Parsing, Storing and Executing TypoScript
        • Myths, FAQ and acknowledgements
      • The TypoScript Parser API
        • Introduction
        • Parsing Custom TypoScript
        • Implementing Custom Conditions
    • User settings configuration
      • ['columns'] Section
      • ['showitem'] section
      • Extending the user settings
      • View the configuration
    • YAML
      • YAML API
      • YAML syntax
      • Services.yaml
  • Extension development
    • Concepts
      • Introduction
      • System and Local Extensions
      • Further reading
    • File structure
      • composer.json
      • ext_conf_template.txt
      • ext_emconf.php
      • ext_localconf.php
      • ext_tables.php
      • ext_tables.sql
      • ext_tables_static+adt.sql
      • ext_typoscript_setup.typoscript
      • Classes
      • Configuration
        • Backend
        • Extbase
          • Persistence
        • TCA
        • TsConfig
        • TypoScript
        • Icons.php
        • RequestMiddlewares.php
        • Services.yaml
      • Documentation
      • Resources
        • Private
          • Language
        • Public
      • Tests
    • Howto
      • Backend modules
        • Backend interface
        • View registered modules
        • Backend module API
        • Backend Template View (Extbase)
        • Backend module API (Extbase)
        • Register a toplevel module (Extbase)
        • The Backend Template View (core)
        • Backend module API (core)
        • Tutorials
      • Events
      • Extending the TCA array
        • Storing the changes
        • Customization Examples
        • Verifying the TCA
      • Frontend plugin
        • AbstractPlugin
      • Localization
        • Multi-language Fluid templates
        • Localization in PHP
        • TypoScript
      • Publish your extension
        • Publish your extension in the TER
      • HTTP requests to external sources
      • Update your extension for new TYPO3 versions
        • Extension scanner
        • Upgrade wizards
          • The concept of upgrade wizards
          • Creating upgrade wizards
      • Configuration
      • Creating a new distribution
      • Creating a new extension
      • Custom Extension Repository
      • Adding documentation
      • Extension management
    • Extbase
      • Introduction
      • Reference
        • Model / Domain
          • Model
          • Persistence
          • Repository
          • Validator
        • Controller
          • ActionController
          • Error action
          • Type converters
        • View
        • URI builder (Extbase)
        • Registration of frontend plugins
        • TypoScript configuration
        • Annotations
        • Validation
        • Caching
        • Localization
        • URI arguments and reserved keywords
      • Examples
    • Best practises and conventions
      • Choosing an extension key
      • Naming conventions
      • Configuration Files (ext_tables.php & ext_localconf.php)
      • Software Design Principles
    • Tutorials
      • Kickstart
        • Make
          • Create a new backend controller
          • Create a new console command
        • Sitepackage Builder
          • Minimal extension
      • Tea
        • Create an extension
        • Create a directory structure
        • Model: a bag of tea
        • Repository
        • Controller
  • Security guidelines
    • Introduction
    • The TYPO3 Security Team
    • General Information
    • Types of Security Threats
    • General guidelines
    • Guidelines for System Administrators
      • Role Definition
      • Integrity of TYPO3 Packages
      • File/directory permissions
      • Restrict access to files on a server-level
      • Disable directory indexing
      • File extension handling
      • Content security policy
      • Database access
      • Encrypted Client/server Communication
      • Other Services
      • Further Actions
    • Guidelines for extension development
    • Guidelines for TYPO3 integrators
      • Install tool
      • Global TYPO3 configuration options
      • Security-related warnings after login
      • Reports and logs
      • Users and access privileges
      • TYPO3 extensions
      • TypoScript
      • Content elements
    • Guidelines for editors
    • Backup strategy
    • Detect, analyze and repair a hacked site
      • Detect a hacked website
      • Take the website offline
      • Analyzing a hacked site
      • Repair/restore
      • Further actions
  • Testing
    • History
    • Core testing
    • Extension testing
    • Project testing
    • Writing unit tests
    • Writing functional tests
    • Writing acceptance tests
    • FAQ
  • About This Manual
  • Sitemap

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Update your extension for new TYPO3 versions¶

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  • Upgrade wizards
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    • Creating upgrade wizards
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