Setting Sun's Blog – 残阳 彪悍的人生不需要解释~~

使用 GetText 扩展实现国际化支持

首先，我们构建一个简单的 I18n 工具类 I18n.php：

class I18n
{
    /**
     * 默认语言
     *
     * @var string
     */
    const DEFAULT_LOCALE = 'zh_CN';
    /**
     * 默认编码
     *
     * @var string
     */
    const DEFAULT_CHARSET = 'UTF-8';

    /**
     * 单实例对象序列
     *
     * @var array
     */
    private static $instances = array();
    /**
     * 当前语言
     *
     * @var string
     */
    private static $locale;
    /**
     * 当前域
     *
     * @var string
     */
    private $domain;

    /**
     * 格式化索引
     *
     * @param string $key
     * @return string
     */
    public static function quote($key)
    {
    	return '/\{'.$key.'\}/';
    }

    /**
     * 构造函数
     *
     * @param string $domain
     */
    private function __construct($domain)
    {
    	$this->domain = $domain;

    	bind_textdomain_codeset($this->domain, self::DEFAULT_CHARSET);
    	bindtextdomain($this->domain, LOCALE_DIR);
    }

    /**
     * 获取格式化后的文本
     *
     * @param string $key
     * @param array $params
     * @return string
     */
    public function _($key, $params = null)
    {
        $text = dgettext($this->domain, $key);

        if (empty($params))
        {
        	return $text;
        } else {
        	return preg_replace(
        		array_map('I18n::quote', array_keys($params)),
        		array_values($params),
        		$text
        	);
        }
    }

    /**
     * 取得一个单实例I18n对象
     *
     * @param string $domain
     * @return I18n
     */
    public static function getInstance($domain)
    {
    	if (empty(self::$locale))
    	{
    		self::setLocale(self::DEFAULT_LOCALE);
    	}

    	if (!array_key_exists($domain, self::$instances))
        {
            self::$instances[$domain] = new I18n($domain);
        }

        return self::$instances[$domain];
    }

    /**
     * 设置I18n语言
     *
     * @param string $locale
     */
    public static function setLocale($locale)
    {
    	self::$locale = $locale;
        setlocale(LC_ALL, $locale);
    }
}

然后我们再生成 2 个用于测试的 po 文件。

首先是中文的语言文件 locale\zh_CN\LC_MESSAGES\message.po:

msgid ""
msgstr ""
"Project-Id-Version: message\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2008-06-12 17:26+0800\n"
"PO-Revision-Date: 2009-12-15 20:39+0800\n"
"Last-Translator: Zivn \n"
"Language-Team: zh_CN\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"X-Poedit-Language: Chinese\n"
"X-Poedit-Country: CHINA\n"
"X-Poedit-SourceCharset: utf-8\n"

msgid "testMsg"
msgstr "这是一条测试信息！你好，{name}！"

msgid "userName"
msgstr "火星梅梅"

然后是英文的语言文件 locale\en_US\LC_MESSAGES\message.po:

"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2008-06-12 17:26+0800\n"
"PO-Revision-Date: 2009-12-15 20:40+0800\n"
"Last-Translator: Zivn \n"
"Language-Team: \n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"X-Poedit-Language: English\n"
"X-Poedit-Country: AMERICAN SAMOA\n"
"X-Poedit-SourceCharset: utf-8\n"

msgid "testMsg"
msgstr "This is a test message!Hello,{name}!"

msgid "userName"
msgstr "zivn"

记得要生成二进制的 mo 文件哦。

好了，最后是我们用来测试的主文件：

define('ROOT_PATH', realpath('.'));
define('LOCALE_DIR', ROOT_PATH . DIRECTORY_SEPARATOR . 'locale');

$i18n = I18n::getInstance('message');

// Output: 这是一条测试信息！你好，火星梅梅！
echo $i18n->_('testMsg', array('name' => $i18n->_('userName')))."\n";

// Change Locale
I18n::setLocale('en_US');

// Output: This is a test message!Hello,zivn!
echo $i18n->_('testMsg', array('name' => $i18n->_('userName')))."\n";

转载自http://zivn.me/archives/43