LanguageService

Main API to fetch labels from XLF (label files) based on the current system language of TYPO3. It is able to resolve references to files + their pointers to the proper language. If you see something about "LLL", this class does the trick for you. It is not related to language handling of content, but rather of labels for plugins.

Usually this is injected into $GLOBALS['LANG'] when in backend or CLI context, and populated by the current backend user. Do not rely on $GLOBAL['LANG'] in frontend, as it is only available under certain circumstances! In frontend, this is also used to translate "labels", see TypoScriptFrontendController->sL() for that.

As TYPO3 internally does not match the proper ISO locale standard, the "locale" here is actually a list of supported language keys, (see Locales class), whereas "English" has the language key "default".

Further usages on setting up your own LanguageService in BE:

$languageService = GeneralUtility::makeInstance(LanguageServiceFactory::class)
    ->createFromUserPreferences($GLOBALS['BE_USER']);

Table of Contents

Properties

$lang  : string
This is set to the language that is currently running for the user
$labels  : array<string|int, array<string|int, string>>
$locale  : Locale|null
$locales  : Locales
$localizationFactory  : LocalizationFactory
$overrideLabels  : array<string|int, array<string|int, string>>
$runtimeCache  : FrontendInterface

Methods

__construct()  : mixed
getLabelsFromResource()  : array<string, string>
Load all labels from a resource/file and returns them in a translated fashion.
getLocale()  : Locale|null
includeLLFile()  : array<string|int, mixed>
Includes locallang file (and possibly additional localized version, if configured for) Read language labels will be merged with $LOCAL_LANG.
init()  : void
Initializes the language to fetch XLF labels for.
overrideLabels()  : void
Define custom labels which can be overridden for a given file. This is typically the case for TypoScript plugins.
sL()  : string
Main and most often used method.
translateLabel()  : string
Translates prepared labels which are handed in, and also uses the fallback if no language is given.
getLLL()  : string
Returns the label with key $index from the $LOCAL_LANG array used as the second argument
readLLfile()  : array<string|int, mixed>
Includes a locallang file and returns the $LOCAL_LANG array found inside.

Properties

$lang

This is set to the language that is currently running for the user

public string $lang = 'default'

$labels

protected array<string|int, array<string|int, string>> $labels = []

$overrideLabels

protected array<string|int, array<string|int, string>> $overrideLabels = []

Methods

getLabelsFromResource()

Load all labels from a resource/file and returns them in a translated fashion.

public getLabelsFromResource(string $fileRef) : array<string, string>
Parameters
$fileRef : string
Internal

not part of TYPO3 Core API for the time being.

Return values
array<string, string>

includeLLFile()

Includes locallang file (and possibly additional localized version, if configured for) Read language labels will be merged with $LOCAL_LANG.

public includeLLFile(string $fileRef) : array<string|int, mixed>
Parameters
$fileRef : string

$fileRef is a file-reference

Internal

do not rely on this method as it is only used for internal purposes in TYPO3 v13.0.

Return values
array<string|int, mixed> —

returns the loaded label file

init()

Initializes the language to fetch XLF labels for.

public init(Locale|string $languageKey) : void 
$languageService = GeneralUtility::makeInstance(LanguageServiceFactory::class)
    ->createFromUserPreferences($GLOBALS['BE_USER']);
Parameters
$languageKey : Locale|string

The language key (two character string from backend users profile)

Internal

use one of the factory methods instead

Tags
throws
RuntimeException

overrideLabels()

Define custom labels which can be overridden for a given file. This is typically the case for TypoScript plugins.

public overrideLabels(string $fileRef, array<string|int, mixed> $labels) : void
Parameters
$fileRef : string
$labels : array<string|int, mixed>

sL()

Main and most often used method.

public sL(string $input) : string

Resolve strings like these:

'LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:labels.depth_0'

This looks up the given .xlf file path in the 'core' extension for label labels.depth_0

Parameters
$input : string

Label key/reference

Return values
string

translateLabel()

Translates prepared labels which are handed in, and also uses the fallback if no language is given.

public translateLabel(array<string|int, mixed>|string $input, string $fallback) : string

This is common in situations such as page TSconfig where labels or references to labels are used.

Parameters
$input : array<string|int, mixed>|string
$fallback : string
Internal

not part of TYPO3 Core API for the time being.

Return values
string

getLLL()

Returns the label with key $index from the $LOCAL_LANG array used as the second argument

protected getLLL(string $index, array<string|int, mixed> $localLanguage) : string
Parameters
$index : string

Label key

$localLanguage : array<string|int, mixed>

$LOCAL_LANG array to get label key from

Return values
string

readLLfile()

Includes a locallang file and returns the $LOCAL_LANG array found inside.

protected readLLfile(string $fileRef) : array<string|int, mixed>
Parameters
$fileRef : string

Input is a file-reference to be a 'local_lang' file containing a $LOCAL_LANG array

Return values
array<string|int, mixed> —

value of $LOCAL_LANG found in the included file, empty if none found


        

        
    




    

    

                            

            

                            
    

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