symfony/translation

Features

• Internationalization Libraries - Provides a complete internationalization library for PHP with message catalogs, locale handling, and ICU MessageFormat.
• Translation Placeholder Substitutions - Replaces percent-delimited placeholders in translated messages with dynamic values.
• XLIFF Extraction and Compilation - Reads translation strings from XLIFF XML files supporting versions 1.2 through 2.2 for structured localization.
• ICU MessageFormat Placeholders - Inserts variable values into translated strings using curly-brace placeholders processed by the ICU MessageFormatter.
• Message Domain Organization - Organizes translatable strings into named domains for separate translation files per application part.
• I18n Message Extraction - Provides a complete internationalization workflow with message catalogs, ICU MessageFormat, and locale-aware formatting.
• String Localization - Loads a set of translated messages for a given locale and replaces source strings with their localized equivalents.
• String Translation Mappers - Translates a given message into the current language using the active locale and an optional translation domain.
• Automatic Service Registration - Makes any class in the source directory available as a service that is instantiated only when requested and reused across the application.
• Callable Service Injectors - Provides the ability to inject invokable services or closures as constructor arguments in the dependency injection container.
• Directory Service Importers - Provides a configuration method to register all classes in a directory as services using glob patterns.
• Service Containers - Provides a service container with autowiring, parameter injection, and service definition management.
• Functional Interface Adapters - Provides a way to generate adapter classes that implement a single-method interface by forwarding to another service.
• Multiple Instance Registrators - Provides the ability to register multiple services from the same class with different arguments and unique identifiers.
• Global Argument Binders - Provides global argument binding for constructor arguments across all services in the dependency injection container.
• Internationalized Templates - Applies the translation filter or tag to strings and variables inside Twig templates to output localized text.
• HTTP Method Restrictions - Restricts which HTTP verbs a route responds to, enabling different behavior for GET, POST, and other methods.
• Controller Argument Resolvers - Provides automatic service injection into controller arguments via type-hinted parameters.
• XLIFF File Loaders - Loads translation strings from XLIFF files supporting versions 1.2 through 2.2.
• Locale Translation Files - Organizes translations into domain.locale.format files with override priority across application bundles.
• Locale Fallback Chains - Defines prioritized fallback locale chains consulted when a translation key is missing from the primary locale.
• Automatic Constructor Injection - Resolves constructor type-hints to the matching service from the container without manual wiring.
• Pluralization and Interpolation Engines - Converts XLIFF 2.2 PGS attributes into ICU MessageFormat strings for locale-aware plural, gender, and select handling.
• Pluralization Rules - Applies language-specific plural rules to select the correct grammatical form for a numeric count.
• ICU Message Parsing - Provides ICU MessageFormat parsing and processing for pluralization, gender, and conditional selection in translations.
• Translation Message Domains - Organizes translatable strings into named domains for modular translation catalogs across application parts.
• Automatic Service Taggers - Provides automatic service tagging based on implemented interfaces for dependency injection configuration.
• Translation Keys - Translates strings by looking up semantic keys instead of source text.
• Accept-Language Locale Settings - Automatically sets the request locale from the Accept-Language header for locale-aware routing.
• Service Implementation Selectors - Provides a mechanism to override autowired services by specifying a different service identifier for a constructor argument.
• URL Route Mapping - Maps URL patterns to controller methods, invoking the appropriate handler when a route matches.
• Locale Fallback Mechanisms - Defines a prioritized chain of fallback locales for resolving missing translations.
• Key-Based String Localizations - Implements key-based string lookup that decouples source text from localized versions in translation catalogs.
• Localized Routing - Defines unique URL paths per locale and automatically sets the request locale on route match.
• PHP Translation Libraries - Provides a complete translation framework for PHP applications with message catalogs, locale handling, and XLIFF support.
• ICU MessageFormat Translators - Provides a translator that processes ICU MessageFormat strings for complex pluralization and gender handling.
• Template-to-Response Rendering - Renders Twig templates into HTTP responses with provided variables.
• Route Parameter Validation - Constrains route parameter values using regular expressions to ensure only matching URLs are accepted.
• Route Parameter Accessors - Provides access to the matched route's name and parameters from the request object or global variable.
• Route Parameter Captures - Allows route parameters to be optional with default values, enabling flexible URL matching.
• Route Grouping - Supports grouping routes under common prefixes and defaults to reduce repetition in route definitions.
• Route Naming Systems - Implements a route naming system that generates URLs from named routes across controllers and templates.
• Named Route Redirects - Configures routes to issue redirects to other URLs or named routes without writing a controller.
• URL Routing Engines - Provides a URL routing engine that generates URLs from named routes for links and redirects.
• Default Translation Domains - Sets a default translation domain for all translation calls within a template.
• Session-Based Locale Persistence - Persists the user's locale in the session for consistent language across requests.
• Dynamic Locale Switching - Changes the application locale for a block of code or callback without affecting the rest of the request.
• Translation String Contexts - Stores translator-facing context notes inside XLIFF 2 files to clarify the meaning or usage of strings.
• Expression-Based Translation Messages - Evaluates dynamic expressions inside translation messages for context-aware output.
• Provider Push-Pull Interfaces - Provides a push-pull abstraction for synchronizing translation catalogs with third-party localization services.
• Unused Translation Key Detectors - Scans templates and code to identify translation keys that are missing from catalogs or no longer used.
• Deferred Translation Objects - Provides Translatable objects that store message IDs and parameters for deferred rendering in templates.
• Enabled Locale Restrictions - Restricts translation generation and routing to a configured set of enabled locales.
• Translation File Validators - Ships console commands to lint and validate YAML and XLIFF translation file syntax.
• Conditional Message Selectors - Selects between alternative translations based on a variable's value for gendered or conditional text.
• Translation Extraction - Scans templates and code for translatable strings and updates translation files via console commands.
• Source Code Translation Extractors - Scans PHP and Twig source files to extract translatable strings and synchronize translation catalogs.
• Ordinal Formatters - Provides locale-aware ordinal number formatting via the IntlNumberFormatter component.
• Translation Format Registrations - Registers custom loaders and dumpers for non-standard translation file formats.
• Deferred Translation Objects - Ships translatable objects that defer rendering until output is needed, storing parameters for later use.
• Session Flash Messaging - Stores a notification message in the session that is automatically removed after it is displayed to the user.

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