Feature: #84581 - Introduce Site Handling¶
See Issue #84581
Site Handling has been added to TYPO3.
Its goal is to make managing multiple sites easier to understand and faster to do. Sites bring a variety of new concepts to TYPO3 which we will explain below.
Take your time and read through the entire document since some concepts rely on each other.
New sites will live in the folder
typo3conf/sites/. In the first iteration this folder will contain a file called
config.yaml which holds all configuration for a given site.
Note that if you are using a composer based installation, then the file location is
In the future this folder can (and should) be used for more files like Fluid templates, and Backend layouts.
# the rootPage Id (see below) rootPageId: 12 # my base domain to run this site on. It either accepts a fully qualified URL or "/" to react to any domain name base: 'https://www.example.com/' # The language array languages: - # the TYPO3 sys_language_uid as you know it since... ever languageId: '0' # The internal name for this language. Unused for now, but in the future this will affect display in the backend title: English # optional navigation title which is used in HMENU.special = language navigationTitle: '' # Language base. Accepts either a fully qualified URL or a path segment like "/en/". base: / # sets the locale during frontend rendering locale: en_US.UTF-8 # two-letter code for the language according to ISO-639 nomenclature (see https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) iso-639-1: en # FE href language hreflang: en-US # FE text direction direction: ltr # Language Identifier to use in localLang XLIFF files typo3Language: default # Flag Identifier flag: gb - languageId: '1' title: 'danish' navigationTitle: Dansk base: /da/ locale: dk_DK.UTF-8 iso-639-1: da hreflang: dk-DK direction: ltr typo3Language: default flag: dk fallbackType: strict - languageId: '2' title: Deutsch navigationTitle: '' base: 'https://www.beispiel.de' locale: de_DE.UTF-8 iso-639-1: de hreflang: de-DE direction: ltr typo3Language: de flag: de # Enable content fallback fallbackType: fallback # Content fallback mode (order is important) fallbacks: '2,1,0' # Error Handling Array (order is important here) # Error Handlers will check the given status code, but the special value "0" will react to any error not configured # elsewhere in this configuration. errorHandling: - # HTTP Status Code to react to errorCode: '404' # The used ErrorHandler. In this case, it's "Display content from Page". See examples below for available options. errorHandler: Page # href to the content source to display (accepts both fully qualified URLs as well as TYPO3 internal link syntax errorContentSource: 't3://page?uid=8' - errorCode: '403' errorHandler: Fluid # Path to the Template File to show errorFluidTemplate: 'EXT:my_extension/Resources/Private/Templates/ErrorPages/403.html' # Optional Templates root path errorFluidTemplatesRootPath: 'EXT:my_extension/Resources/Private/Templates/ErrorPages' # Optional Layouts root path errorFluidLayoutsRootPath: 'EXT:my_extension/Resources/Private/Layouts/ErrorPages' # Optional Partials root path errorFluidPartialsRootPath: 'EXT:my_extension/Resources/Private/Partials/ErrorPages' - errorCode: '0' errorHandler: PHP # Fully qualified class name to a class that implements PageErrorHandlerInterface errorPhpClassFQCN: Vendor\ExtensionName\ErrorHandlers\GenericErrorhandler
All settings can also be edited via the backend module
Site Management > Configuration.
Keep in mind that due to the nature of the module, comments or additional values in your
will get deleted on saving.
The site identifier is the name of the folder within
typo3conf/sites/ that will hold your configuration file(s). When
choosing an identifier make sure to stick to ASCII but you may also use
. for convenience.
Root pages are identified by one of these two properties:
- they are direct descendants of PID 0 (the root root page of TYPO3)
- they have the “Use as Root Page” property in
pagesset to true.
The new backend module relies on FormEngine to render the edit interface. Since the form data is not stored in
database records but in
.yml files, a couple of details have been extended of the default FormEngine code.
The render configuration is stored in
typo3/sysext/backend/Configuration/SiteConfiguration/ in a format
syntactically identical to TCA. However, this is not loaded into
$GLOBALS['TCA'] scope, and only a small
subset of TCA features is supported.
Extending site configuration is experimental and may change any time.
In practice the configuration can be extended, but only with very simple fields like the basic config type
and even for this one not all features are possible, for example the
eval options are limited. The code throws
exceptions or just ignores settings it does not support. While some of the limits may be relaxed a bit over time, many
will be kept. The goal is to allow developers to extend the site configuration with a couple of simple things like
an input field for a Google API key. However it is not possible to extend with complex TCA like inline relations,
database driven select fields, Flex Form handling and similar.
The example below shows the experimental feature adding a field to site in an extensions file
Configuration/SiteConfiguration/Overrides/sites.php. Note the helper methods of class
TYPO3\CMS\core\Utility\ExtensionManagementUtility can not be used.
<?php // Experimental example to add a new field to the site configuration // Configure a new simple required input field to site $GLOBALS['SiteConfiguration']['site']['columns']['myNewField'] = [ 'label' => 'A new custom field', 'config' => [ 'type' => 'input', 'eval' => 'required', ], ]; // And add it to showitem $GLOBALS['SiteConfiguration']['site']['types']['0']['showitem'] = str_replace( 'base,', 'base, myNewField, ', $GLOBALS['SiteConfiguration']['site']['types']['0']['showitem'] );
The field will be shown in the edit form of the configuration module and it’s value stored in the .yaml
file. Using the site object
TYPO3\CMS\core\Site\Entity\Site, the value can be fetched using
The following TypoScript settings will be set based on
config.yaml rather than needing to have them in your TypoScript
Links to pages within a site can now be generated via any access of TYPO3, so in both BE and FE as well as CLI mode.