如何在通过unctions.php或plugin创建Widget时使用CONTROL_CALLBACK？

我在函数中创建了一个仪表板小部件。php文件。我想让它能够在提交表格后更新数据库中的一些内容。根据codex文档，我应该使用wp\\u add\\u dashboard\\u widget（）的第四个参数$control\\u callback来处理我提交的帖子。

因此，我创建了处理程序函数，并将其包含在函数中。php文件。当我提交表格时，什么都没有发生。我想了一会儿，然后用add\\u action（）将回调函数连接到wp\\u dashboard\\u setup；我的回调函数现在运行，但无论我是否将control\\u回调函数传递给wp\\u add\\u dashboard\\u widget（），它都会运行，这让我觉得我的解决方案有点像黑客。

我做错了吗？还有更好的方法吗？还有，我的表单应该提交到任何地方吗？或者它可以直接提交到它绘制的地方吗？

这是我的完整代码：

function custom_dashboard_widget_coach() {
        echo "
        <p><strong>Finalize Game</strong></p>
        <form method=\'post\'>
        <div class=\'team_class_wrap\'>
            <label>Class</label>
            <select name=\'team\' id=\'team\'>
                <option value=\'5a\'>5A</option>
                <option value=\'4a\'>4A</option>
                <option value=\'3a\'>3A</option>
                <option value=\'2a\'>2A</option>
            </select>
        </div>          
        <input type=\'submit\' value=\'Report Game Result\' />
        </form>
        ";
    }

    function custom_dashboard_widget_coach_handle()
    {
        var_dump($_POST);exit;

    }

    function add_custom_dashboard_widget_coach() {
        wp_add_dashboard_widget(\'custom_dashboard_widget_coach\', \'My Team\', \'custom_dashboard_widget_coach\', \'custom_dashboard_widget_coach_handle\');
    }
    add_action(\'wp_dashboard_setup\', \'custom_dashboard_widget_coach_handle\');
    add_action(\'wp_dashboard_setup\', \'add_custom_dashboard_widget_coach\');

<?php /* Plugin Name: custom dashboard widget Plugin URI: http://en.bainternet.info Description: custom dashboard widget with control form Version: 0.1 Author: bainternet Author URI: http://en.bainternet.info */ //show widget function custom_dashboard_widget_coach() { //get saved data if ( !$widget_options = get_option( \'my_dashboard_widget_options\' ) ) $widget_options = array(); $saved_team = isset($widget_options[\'team\'])? $widget_options[\'team\'] : \'\'; echo " <p><strong>Finalized Game</strong></p> <div class=\'team_class_wrap\'> <label>Class {$saved_team}</label> </div> "; } //configure and update widget function custom_dashboard_widget_coach_handle(){ //get saved data if ( !$widget_options = get_option( \'my_dashboard_widget_options\' ) ) $widget_options = array(); //process update if ( \'POST\' == $_SERVER[\'REQUEST_METHOD\'] && isset($_POST[\'my_dashboard_widget_options\']) ) { //minor validation $widget_options[\'team\'] = wp_kses($_POST[\'my_dashboard_widget_options\'][\'team\'],array() ); //save update update_option( \'my_dashboard_widget_options\', $widget_options ); } //set defaults if(!isset($widget_options[\'team\'])) $widget_options[\'team\'] = \'\'; //you can set the default echo " <p><strong>Finalize Game</strong></p> <div class=\'team_class_wrap\'> <label>Class</label> <select name=\'my_dashboard_widget_options[team]\' id=\'team\'> <option value=\'5a\' ".selected( $widget_options[\'team\'], \'5a\', false ).">5A</option> <option value=\'4a\' ".selected( $widget_options[\'team\'], \'4a\', false ).">4A</option> <option value=\'3a\' ".selected( $widget_options[\'team\'], \'3a\', false ).">3A</option> <option value=\'2a\' ".selected( $widget_options[\'team\'], \'2a\', false ).">2A</option> </select> </div> "; } //register widget function add_custom_dashboard_widget_coach() { wp_add_dashboard_widget(\'custom_dashboard_widget_coach\', \'My Team\', \'custom_dashboard_widget_coach\', \'custom_dashboard_widget_coach_handle\'); } add_action(\'wp_dashboard_setup\', \'add_custom_dashboard_widget_coach\');