以下是我保存数据的代码：

function save_new_exam(){

    extract($_POST);
    global $wpdb;
    $wpdb->insert( 
        \'wp_absb_exam_setting\', 
        array( 
            \'name\' => $name, 
            \'time\' => $time,
            \'status\' => 1, 
            \'user_id\' => get_current_user_id()
        ), 
        array( 
            \'%s\', 
            \'%s\',
            \'%d\',
            \'%d\'
        ) 
    );  

    do_action( \'admin_notices\', \'new_exam_created\' );
}
function new_exam_created(){

    ?>
<div class="notice notice-success is-dismissible">
    <p> Saved successfully!</p>
</div>
<?php }

以下是表格代码：

<form method="post" action="<?php echo $_SERVER[\'REQUEST_URI\']; ?>">
        <table class="form-table">
            <tbody>
                <tr valign="top">
                    <th scope="row">
                        <label for="mail_from"><?php _e("Exam Title"); ?></label>
                    </th>
                    <td>
                        <input name="name" type="text"  value="" size="40" class="regular-text">

                        <p class="description">
                            Give a Meaningful Exam Title.                       
                        </p>
                    </td>
                </tr>   
                <tr valign="top">
                    <th scope="row">
                        <label for="mail_from"><?php _e("Exam Time"); ?></label>
                    </th>
                    <td>
                        <input name="time" type="text"  value="" size="40" class="regular-text">

                        <p class="description">
                            Set exam time as HH:MM:SS format.                       
                        </p>
                    </td>
                </tr>
            </tbody>
        </table>
        <p class="submit">
            <input type="submit" name="submit" id="submit" class="button-primary" value="Save Changes">
        </p>
    </form>

当我提交表单时，数据正在保存，但没有显示管理通知。我的代码中有什么问题？我在google上搜索了几个小时，但没有成功。请帮忙！