php 多语言包开发思路

<?php
// 语言包类
class LanguagePack {
    private $lang = 'en'; // 默认语言
    private $data = []; // 语言包数据

    public function __construct($lang = 'en') {
        $this->lang = $lang;
        $this->loadLanguage($lang);
    }

    private function loadLanguage($lang) {
        $file = __DIR__ . "/lang/{$lang}.php";
        if (file_exists($file)) {
            $this->data = require $file;
        } else {
            throw new Exception("Language file not found: {$file}");
        }
    }

    public function get($key) {
        return isset($this->data[$key]) ? $this->data[$key] : $key;
    }

    public function setLang($lang) {
        $this->loadLanguage($lang);
        $this->lang = $lang;
    }
}

// 使用示例
$langPack = new LanguagePack('zh'); // 初始化中文语言包
echo $langPack->get('hello'); // 输出翻译后的字符串
?>