语言选择列表

Question

我正在创建选择列表。但我不知道如何根据所选语言更改窗口语言，我需要通过打开$lang.es 和$lang.en 文件中的这些翻译来获得帮助。举个例子：

<?php
/* 
------------------
Language: English
------------------
*/
$lang = array();

$lang['page_title'] = 'Client Service System';
$lang['username'] = 'Username';
$lang['password'] = 'Password';
$lang['language'] = 'Language';
$lang['es'] = 'Espaniol';
$lang['en'] = 'English';
$lang['forgot'] = 'Forgot password';
$lang['submit'] = 'login';

?>

这是我的 html php 脚本，下拉列表是：

<tr>
    <td align="right" nowrap><?php echo $lang['language'];?>:</td>
    <td align="left" nowrap>
        <select type="language" id="my-select" name="language" class="text" onchange="javascript:languageChange();">
            <option value="es"><?php echo $lang['es']; ?></option>
            <option value="en"><?php echo $lang['en']; ?></option>
        </select>
    </td>
</tr>    <script type="text/javascript">
        var select = document.forms[0].language;
        select.onchange = function(){
           var kalba =  select.options[select.selectedIndex].value; // to get Value
           var text =  select.options[select.selectedIndex].text; // to get Text
        }; </script>

Answer 1

在 PHP 中处理本地化的方法有很多。如another question 所述，您可以使用PHP 的gettext。您还可以使用常量store in JSON format，将其存储在数据库或数组中，就像您正在做的那样。

要使您的脚本正常工作，首先您需要重定向到设置要加载的语言的 PHP 脚本。然后让你的脚本有条件地打开其中一个文件。

这是一个简单的实现，有一个类来处理语言文件的加载和检索。

PHP 主脚本

<?php
require 'Localization.Class.php';

$localization = new Localization();
$localization->addLanguage("en");
$localization->addLanguage("es");
$lang = $localization->getLanguageStrings($_GET);
$selectedLanguage = $localization->getSelectedLanguage();
?>

<tr>
    <td align="right" nowrap><?php echo $lang['language'];?>:</td>
    <td align="left" nowrap>
        <form>
            <select type="language" id="my-select" name="language" class="text" onchange="javascript:languageChange();">
                <option value="es"<?php echo ($selectedLanguage == "es") ? " selected" : ""; ?>><?php echo $lang['es']; ?></option>
                <option value="en"<?php echo ($selectedLanguage == "en") ? " selected" : ""; ?>><?php echo $lang['en']; ?></option>
            </select>
        </form>
    </td>
</tr>    

<script type="text/javascript">
var select = document.forms[0].language;
select.onchange = function(){
   var selectedLanguage = select.options[select.selectedIndex].value;
   window.location.href = '?lang=' + selectedLanguage;
}; 
</script>

Localization.Class.php

<?php
class Localization
{
    private $defaultLanguage = "en";
    private $chosenLanguage = null;
    private $languages = array();

    public function getLanguageStrings($get) {
        $this->identifyLanguage($get);
        $languageArray = $this->getLanguageFileContents();
        return $languageArray;
    }

    public function addLanguage($lang) {
        $this->languages[] = $lang;
    }

    public function getSelectedLanguage() {
        return $this->chosenLanguage;
    }

    private function identifyLanguage($get) {
        if (isset($get['lang']) and $get['lang'] !== "") {
            if (!in_array($get['lang'], $this->languages)) {
                // this is an important check, as this string will be used
                // as part of the filename to be included
                throw new Exception(__METHOD__ . ": The specified language ($get[lang]) was not found.");
            }
            $this->chosenLanguage = $get['lang'];
        } else {
            $this->chosenLanguage = $this->defaultLanguage;
        }
    }

    private function getLanguageFileContents() {
        $filename = "lang.{$this->chosenLanguage}.php";
        if (!file_exists($filename)) {
            throw new Exception(__METHOD__ . ": The language file \"$filename\" was not found.");
        }
        include $filename;
        return $lang;
    }
}
?>