Yii2 学习笔记之国际化

// 代码片段中，'app' 代表文本消息的类别
echo \Yii::t('app', 'This is a message to translate!');

'components' => [
    // ...
    'i18n' => [
        'translations' => [
            	'*' => [
                'class' => 'yii\i18n\PhpMessageSource',
                'basePath' => '@common/messages',
                //'sourceLanguage' => 'en',
                'fileMap' => [
                    'common' => 'common.php',
                    'backend' => 'backend.php',
                    'frontend' => 'frontend.php',
                ],
            ],
        ],
    ],
],

│──backend
│──common
│   │──messages
│       │──es
│       │──ru
│       │──zh
│          │──backend.php
│          │──common.php
│          │──frontend.php
│──frontend

<?php
    return [
        'This is a string to translate' => '这是一个翻译的字符串'
    ];
?>

//测试 A
public function actionTest1() {
    //该文本消息会被翻译成中文，因为设定的目标语言是 zh-CN。我们也可以动态地改变应用程序的语言。
    echo \Yii::t('backend', 'This is a string to translate');
    \Yii::$app->language = 'en-US';
    echo \Yii::t('backend', 'This is a string to translate!');
}

//测试 B
//在一个转换(翻译)的消息，可以插入一个或多个参数
public function actionTest2() {
    $username = 'Username1';
    // display a translated message with username being "Vladimir"
    echo \Yii::t('backend', 'Hello, {username}!', [
        'username' => $username,
    ]), "<br>";
    $username = 'username2';
    // display a translated message with username being "John"
    echo \Yii::t('backend', 'Hello, {username}!', [
        'username' => $username,
    ]), "<br>";
    $price = 150;
    $count = 3;
    $subtotal = 450;
    echo \Yii::t('backend', 'Price: {0}, Count: {1}, Subtotal: {2}', [$price, $count, $subtotal]);
}

<?php
   /* @var $this yii\web\View */
   $this->title = 'My Yii Application';
?>

<div class = "site-index">
   <div class = "jumbotron">
      <h1>欢迎您访问!</h1>
   </div>
</div>