我目前正在重写一个小插件，向访问者显示一个小信息文本。这个插件到目前为止是德语的，所以我想添加多语言支持，因为我正在处理一个应该是英语和德语的页面。可以在插件的设置界面中设置显示给访问者的文本。给定值存储在数据库中的单个选项中。在修改后的插件中，我将设置存储在单独的选项中，每个选项对应一种语言。我添加了一个$_GET 在设置注册中使用的参数，用于为特定于语言的选项创建唯一名称。

我的插件类的重要（精简）部分：

class Privacy_Policies {
    // the language to which the text is translated
    public $translation;
    // the options, stored in the database
    public $options;

    public function __construct() {
        // use the current user locale as a fallback
        $this->translation = isset($_GET[\'lang\']) ? $_GET[\'lang\'] : get_user_locale();
        // if an option already exists, edit it
        // use $this->translation to determine the right language
        $this->options = get_option(\'privacy_policies_\' . $this->translation);
        // call registration when settings page gets loaded
        add_action(\'admin_init\', array($this, \'register_settings\');
        // create the settings page
        add_action(\'admin_menu\', array($this, \'add_settings_page\');
    }

    // settings validation, called as callback to register settings
    public function validate_settings($value) {
        if (isset($value[\'checkbox\']) && 1 == $value[\'checkbox\']) {
            $value[ \'checkbox\' ] = 1;
        } else {
            $value[ \'checkbox\' ] = 0;
        }
        $value[\'notice\'] = normalize_whitespace($value[\'notice\' ]);
        $value[\'error_message\'] = normalize_whitespace($value[\'error_message\']);
        $value[\'style\'] = normalize_whitespace($value[\'style\']);

        return $value;
    }

    // register a distinct option name for each language
    // the function is called when the settings page gets loaded
    public function register_settings() {
        register_setting(
            \'privacy_notice_settings_group\', 
            \'privacy_notice_settings_\' . $this->translation,
            array( $this, \'validate_settings\' )
        );
    }

    // create the html for the settings page
    // stripped down to a simple checkbox
    public function get_settings_page() { ?>
        <h2><?php echo $this->get_plugin_data(\'Name\'); ?></h2>
        <form method="post" action="options.php">
            <?php settings_fields(\'privacy_notice_settings_group\'); ?>
            <table class="form-table">
                <tr valign="top">
                    <td>
                        <!-- important: \'name\' must reflect the option name! -->
                        <input type="checkbox" id="privacy_checkbox" name="privacy_notice_settings_<?php echo $this->translation ?>[checkbox]" value="1"
                        <?php if (isset($this->options[\'checkbox\'])) {
                            checked(\'1\', $this->options[\'checkbox\']);
                        } ?> />
                    </td>
                </tr>
            </table>
        </form>
    <?php }

    // add settings page
    // called in the admin_menu hook
    public function add_settings_page() {
        add_options_page(
            \'Privacy Policies Settings\',
            \'Privacy Policies\',
            \'manage_options\',
            \'privacy_notice_settings_group\',
            array( $this, \'get_settings_page\' )
        );
    }
}

有趣的是，无论在什么地方$this->locale 设置将always 作为WP当前语言环境的设置存储在数据库中(get_user_locale()). 一、 e.由以下内容组成的设置名称\'privacy_notice_settings_\' . $this->translation 神秘地重新组合到\'privacy_notice_settings_\' . get_user_locale().我怀疑秘密藏在什么地方options.php 表单正在调用的。但我似乎无法调试这个。