Wordpress插件:针对同一设置的多个值

// 插件设置表单
function my_plugin_settings_form() {
    $options = array('option1', 'option2', 'option3');
    ?>
    <form method="post">
        <label for="my_plugin_options">选择多个选项：</label>
        <select name="my_plugin_options[]" id="my_plugin_options" multiple>
            <?php foreach ($options as $option): ?>
                <option value="<?php echo $option; ?>"><?php echo $option; ?></option>
            <?php endforeach; ?>
        </select>
        <input type="submit" value="保存设置">
    </form>
    <?php
}

// 处理设置提交
function my_plugin_process_settings() {
    if (isset($_POST['my_plugin_options'])) {
        $selected_options = $_POST['my_plugin_options'];
        update_option('my_plugin_selected_options', $selected_options);
    }
}

// 注册设置表单和处理函数
add_action('admin_menu', function() {
    add_options_page('My Plugin Settings', 'My Plugin', 'manage_options', 'my-plugin-settings', 'my_plugin_settings_form');
});

add_action('admin_init', 'my_plugin_process_settings');