Same name and namespace in other branches

1. 8.9.x core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php \Drupal\user\Plugin\LanguageNegotiation\LanguageNegotiationUser::getLangcode()
2. 10 core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php \Drupal\user\Plugin\LanguageNegotiation\LanguageNegotiationUser::getLangcode()
3. 11.x core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php \Drupal\user\Plugin\LanguageNegotiation\LanguageNegotiationUser::getLangcode()

Performs language negotiation.

@todo Determine whether string|false or string|null should be the normalized result across all implementations and update the

Parameters

\Symfony\Component\HttpFoundation\Request $request: (optional) The current request. Defaults to NULL if it has not been initialized yet.

Return value

string|null|false A valid language code if the negotiation was successful and either NULL or FALSE otherwise.

and its comment accordingly.

Overrides LanguageNegotiationMethodInterface::getLangcode

File

core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php, line 28

Class

LanguageNegotiationUser

Class for identifying language from the user preferences.

Namespace

Drupal\user\Plugin\LanguageNegotiation

Code

public function getLangcode(Request $request = NULL) {
    $langcode = NULL;
    // User preference (only for authenticated users).
    if ($this->languageManager && $this->currentUser
        ->isAuthenticated()) {
        $preferred_langcode = $this->currentUser
            ->getPreferredLangcode(FALSE);
        $languages = $this->languageManager
            ->getLanguages();
        if (!empty($preferred_langcode) && isset($languages[$preferred_langcode])) {
            $langcode = $preferred_langcode;
        }
    }
    // No language preference from the user.
    return $langcode;
}

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