Add translator function

README.md

@@ -110,4 +110,18 @@ alias('@runtime'); // => '/path/to/runtime'
 
 ```php
 aliases('@runtime', '@webroot'); // => ['/path/to/runtime', '/path/to/webroot']
+```
+
+### `t(string $message, array $params = [], string $category = 'app', string $language = null): string`
+
+- `$message` is a translation message
+- `$params` is a translation params
+- `$category` is a translation category
+- `$language` is a translation language
+
+```php
+t('main.hello'); // => 'Hello world'
+t('error.message', ['message' => 'Something went wrong']); // => 'Error: "Something went wrong".'
+t('error.message', ['message' => 'Something went wrong'], 'modules'); // => 'Error from a module: "Something went wrong".'
+t('error.message', ['message' => 'Something went wrong'], 'modules', 'ru'); // => 'Ошибка из модуля: "Something went wrong".'
 ```

composer.json

@@ -12,7 +12,8 @@
         "httpsoft/http-message": "^1.1",
         "yiisoft/router": "^3.0",
         "yiisoft/router-fastroute": "^3.0",
-        "vimeo/psalm": "^5.13"
+        "vimeo/psalm": "^5.13",
+        "yiisoft/translator": "^3.0"
     },
     "provide": {
         "psr/event-dispatcher-implementation": "1.0.0",

src/functions.php

@@ -5,3 +5,5 @@
 require_once __DIR__ . '/user.php';
 require_once __DIR__ . '/view.php';
 require_once __DIR__ . '/router.php';
+require_once __DIR__ . '/alias.php';
+require_once __DIR__ . '/translator.php';

src/translator.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+use Yiisoft\Translator\TranslatorInterface;
+
+function t(
+    string $message,
+    array $parameters = [],
+    string $category = 'app',
+    string $locale = null
+): string {
+    /**
+     * @var TranslatorInterface $translator
+     */
+    $translator = container(TranslatorInterface::class);
+
+    return $translator->translate(
+        $message,
+        $parameters,
+        $category,
+        $locale,
+    );
+}