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WebsafeZfModLanguage

A ZF2 module which takes care of detecting an optimal and|or the requested locale for Your application's translator. The locale is computed/detected basing on values found in: Accept-Language headers, cookie, session, query parameter and route parameter. Each detection method can be disabled/enabled via configuration.

Provides:

• The language service accessible via ServiceManager. See: WebsafeZfModLanguageServiceFactory.

• A Controller for handling client requests (switching locale/language). See: WebsafeZfModLanguageController.

• View Helpers for showing language selecting menus/dropdowns etc.

Using WebsafeZfModLanguage in Your application

In project's root run:

vendor/bin/composer.phar require "websafe/zf-mod-language:*"

In config/application.config.php add WebsafeZfModLanguage:

    // ...
    'modules' => array(
        // ...
        'Application',
        'WebsafeZfModLanguage',
        // ...
    ),

That's all. The module should work now - transparently. Test it on the official ZendSkeletonApplication and try to modify browsers Accept-Language headers or just add ?language=ja_JP (or any other locale available in supported_locales) in the url.

You should notice a language change, because the default configuration tells the language service to detect the locale in the query too, see options detect_in_query and query_param.

There's already a basic view helper included, so after enabling the module in config/application.config.php You can try to add the following code somewhere in layout.phtml or in other view scripts:

The view helper is currently the only reason for the Controller to exist.

Configuration

How locale/language detection is handled.

1. The module attaches the DetectLanguagesListener to the event manager.

2. The DetectLanguagesListener is now waiting for a dispatch event (MvcEvent::EVENT_DISPATCH)...

   1. When the dispatch event occurs, DetectLanguagesListener forwards the event to the language service WebsafeZfModLanguageService.

   2. The language service collects data for locale detection:

      • Retrieve languages requested by the client/browser via [Accept-Language] headers. Add all results ordered by priority to the detectedLanguages array.

      • Retrieve locale stored in cookie (name of cookie is configurable). Prepend the retrieved locale to the front of detectedLanguages.

      • Retrieve locale stored in session (container name and session variable name are configurable). Prepend the retrieved locale to the front of detectedLanguages.

      • Retrieve locale provided in query parameter (parameter name is configurable). Prepend the retrieved locale to the front of detectedLanguages.

      • Retrieve locale provided in route parameter (parameter name is configurable). Prepend the retrieved locale to the front of detectedLanguages.

   3. The language service iterates through detectedLanguages and stops iterating after the first detected locale that exists in [supported_locales]. The matched locale is now accessible via $sm->get('WebsafeZfModLanguageService')->getCurrentLocale().

   4. The language service applies the current locale to the translator service.