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Yii2语言国际化配置Twig翻译解决方案
我自己在写项目的时候，不喜欢使用php自身的模板，主要是各种PHP标签让我烦，而且对Html的标签兼容也不够友好，所以我后面采用了twig模板，配置之类的也是很方便，写起来也很顺手，但是在Yii2语言国际化翻译这块就遇到了坑，当我们指定文件类型，除了处理php扩展的之外，也处理twig扩展的文件的时候，就不会解析twig中的内容，因为不符合PHP的标签处理逻辑，在PHP中我们使用Yii::t()，但是在twig中使用的是Yii.t()这个函数在translator的配置中，显得很乏力，而且看源码也可以发现，实际上也只处理php文件，网上找了很多针对这个问题的处理方式，似乎也没有几个使用的。现在看下我是如何解决的
第一步 显示修改i18n配置
将twig扩展加入进去，修改后如下:
return [
'color' => null,
'interactive' => true,
'help' => null,
'sourcePath' => '@app',
'messagePath' => '@app/messages',
'languages' => ['zh-CN', 'ru-RU'],
'translator' => 'Yii::t', // 翻译器
'sort' => false,
'overwrite' => true,
'removeUnused' => false,
'markUnused' => true,
'except' => [
'.svn',
'.git',
'.gitignore',
'.gitkeep',
'.hgignore',
'.hgkeep',
'/messages',
'/BaseYii.php',
'vendor',
'tests',
'runtime',
'migrations',
],
'only' => [
'*.php',
'*.twig', // 添加模板扩展
],
'format' => 'php',
'db' => 'db',
'sourceMessageTable' => '{{%source_message}}',
'messageTable' => '{{%message}}',
'catalog' => 'messages',
'ignoreCategories' => [],
'phpFileHeader' => '',
'phpDocBlock' => null,
];
第二步 继承重写
创建文件app/commands/TranslatorController.php，内容如下
<?php
namespace app\commands;
use yii\console\controllers\MessageController;
use yii\helpers\Console;
/**
* Extracts messages to be translated from source files.
*
* @author durban.zhang <durban.zhang@gmail.com>
*/
class TranslatorController extends MessageController
{
public function init()
{
parent::init();
}
/**
* This command echoes what you have entered as the message.
* @param string $message the message to be echoed.
*/
protected function extractMessages($fileName, $translator, $ignoreCategories = [])
{
$messages = [];
$extInfo = pathinfo($fileName, PATHINFO_EXTENSION);
if ('twig' == $extInfo) {
$coloredFileName = Console::ansiFormat($fileName, [Console::FG_CYAN]);
$this->stdout("Extracting messages from $coloredFileName...\n");
$subject = file_get_contents($fileName);
$preg = '/\{\{ Yii\.t\(\'(.*?)\', \'(.*?)\'\) \}\}/';
$content = preg_replace($preg, "<?php Yii::t('$1', '$2'); ?>", $subject);
$tokens = token_get_all($content);
foreach ((array) $translator as $currentTranslator) {
$translatorTokens = token_get_all('<?php ' . $currentTranslator);
array_shift($translatorTokens);
$messages = array_merge_recursive(
$messages,
$this->extractMessagesFromTokens(
$tokens,
$translatorTokens,
$ignoreCategories));
}
$this->stdout("\n");
} else {
$messages = parent::extractMessages($fileName, $translator, $ignoreCategories);
}
return $messages;
}
protected function extractMessagesFromTokens(array $tokens, array $translatorTokens, array $ignoreCategories)
{
$messages = [];
$translatorTokensCount = count($translatorTokens);
$matchedTokensCount = 0;
$buffer = [];
$pendingParenthesisCount = 0;foreach ($tokens as $token) {
// finding out translator call
if ($matchedTokensCount < $translatorTokensCount) {
if ($this->tokensEqual($token, $translatorTokens[$matchedTokensCount])) {
$matchedTokensCount++;
} else {
$matchedTokensCount = 0;
}
} elseif ($matchedTokensCount === $translatorTokensCount) {
// translator found
// end of function call
if ($this->tokensEqual(')', $token)) {
$pendingParenthesisCount--;
if (0 === $pendingParenthesisCount) {
// end of translator call or end of something that we can't extract
if (isset($buffer[0][0], $buffer[1], $buffer[2][0]) && T_CONSTANT_ENCAPSED_STRING === $buffer[0][0] && ',' === $buffer[1] && T_CONSTANT_ENCAPSED_STRING === $buffer[2][0]) {
// is valid call we can extract
$category = stripcslashes($buffer[0][1]);
$category = mb_substr($category, 1, -1);
if (!$this->isCategoryIgnored($category, $ignoreCategories)) {
$message = stripcslashes($buffer[2][1]);
$message = mb_substr($message, 1, -1);
$messages[$category][] = $message;
}
$nestedTokens = array_slice($buffer, 3);
if (count($nestedTokens) > $translatorTokensCount) {
// search for possible nested translator calls
$messages = array_merge_recursive($messages, $this->extractMessagesFromTokens($nestedTokens, $translatorTokens, $ignoreCategories));
}
} else {
// invalid call or dynamic call we can't extract
$line = Console::ansiFormat($this->getLine($buffer), [Console::FG_CYAN]);
$skipping = Console::ansiFormat('Skipping line', [Console::FG_YELLOW]);
$this->stdout("$skipping $line. Make sure both category and message are static strings.\n");
}
// prepare for the next match
$matchedTokensCount = 0;
$pendingParenthesisCount = 0;
$buffer = [];
} else {
$buffer[] = $token;
}
} elseif ($this->tokensEqual('(', $token)) {
// count beginning of function call, skipping translator beginning
if ($pendingParenthesisCount > 0) {
$buffer[] = $token;
}
$pendingParenthesisCount++;
} elseif (isset($token[0]) && !in_array($token[0], [T_WHITESPACE, T_COMMENT])) {
// ignore comments and whitespaces
$buffer[] = $token;
}
}
}
return $messages;
}
}
从上面的代码可以看出，实现了两个方法
extractMessages和extractMessagesFromTokens
本来是不需要实现extractMessagesFromTokens这个方法的，但是父类中的private，试过了实例化类，但是需要传递需要的参数，为了避免出现问题，暂时没用实例化的方式。
最后extractMessagesFromTokens这个只是父类的copy版本。那么重点就在extractMessages
判断如果文件是twig文件，则进行处理，处理逻辑我写的也很简单，暂时能解决问题
$preg = '/\{\{ Yii\.t\(\'(.*?)\', \'(.*?)\'\) \}\}/';
$content = preg_replace($preg, "<?php Yii::t('$1', '$2'); ?>", $subject);
$tokens = token_get_all($content);
主要是将Yii.t转为了含有PHP标签的字符串，实际上父类也只是针对代码进行字符串的过滤处理，以此类推的话，如果有其他模板的话也可以采用此方法
到这里就处理完了，
但是执行的命令不是下面这个
./yii message/extract @app/config/i18n.php
而是下面这个
./yii translator/extract @app/config/i18n.php
OK，问题解决，如您有其他方案，请指教
