我目前正在一个网站上工作，我需要为自定义帖子类型保存几种不同类型的元数据。

目前，我有一个文本输入，正在保存，没有问题，但正在努力获得一个选择字段来执行相同的操作。

这是输出选择字段的功能：

function kwi_department_input() {
    // Define function to create meta box for team member department.

    global $post;
    echo \'<input type="hidden" name="teammeta_noncename" id="teammeta_noncename" value="\' . wp_create_nonce(plugin_basename(__FILE__)) . \'" />\';
    $department = get_post_meta($post->ID, \'_department\', true); ?>

    <select name="_department" id="_department">
        <option value="Directors" <?php selected($department, \'Directors\'); ?>>Directors</option>
        <option value="Finance / Admin" <?php selected($department, \'Finance / Admin\'); ?>>Finance / Admin</option>
        <option value="Customer Service Team" <?php selected($department, \'Customer Service Team\'); ?>>Customer Service Team</option>
        <option value="Commercial Team" <?php selected($department, \'Commercial Team\'); ?>>Commercial Team</option>
    </select>
<?php }

function kwi_save_team_meta($post_id) {
    if( !wp_verify_nonce( $_POST[\'teammeta_noncename\'], plugin_basename(__FILE__) )) {
        return $post_id;
    }

    if( !current_user_can( \'edit_post\', $post_id ) ) {
        return $post_id;
    }

    $team_meta = array(
        \'_department\' => $_POST[\'_department\'], 
        \'_languages\' => $_POST[\'_languages\'] // Languages is the text input that is saving with no issue.
    );

    foreach($team_meta as $key => $value) {
        if(get_post_meta($post_id, $key, FALSE)) {
            update_post_meta($post_id, $key, $value);
        } else {
            add_post_meta($post_id, $key, $value);
        }
        if(!$value) {
            delete_post_meta($post_id, $key);
        }
    }
}