我第一次添加了wordpress仪表板小部件。我正在创建一个简单的表单，让用户能够直接从wp仪表板发送支持请求。我不确定所有代码是否都正常工作，在测试期间，我注意到表单不会提交邮件消息。有人能帮我吗？

function uptheme_support_dashboard_widgets()
  {
    global $wp_meta_boxes;
    wp_add_dashboard_widget(\'custom_help_widget\', \'Premium Ticket System\', \'custom_dashboard_help\');
  }

  function custom_dashboard_help()
  {
    $current_theme = wp_get_theme( \'uptheme-panel\' );
    ?>
      <p><?php _e(\'Hi! you are using the custom theme \'. esc_html($current_theme) ); ?></p>
      <p><?php _e(\'Use the form to request support for your theme.\'); ?></p>
      <form method="POST">
      <p><?php _e(\'Email\'); ?></p>
        <input type="text" class="widefat" name="email" id="email" placeholder="" />
      <p><?php _e(\'Request type\'); ?></p>
        <select name="support_ticket_type">
          <option value=""><?php _e(\'Support request\'); ?></option>
          <option value=""><?php _e(\'Modification request\'); ?></option>
        </select>
      <p><?php _e(\'Message\'); ?></p>
        <textarea class="widefat" name="support_message"></textarea>
        <input type="hidden" name="action" value="submit_support_ticket">
        <?php wp_nonce_field( \'submit_support_ticket\', \'support_ticket_hash\' ); ?>
        <button class="btn-primary" type="submit" class=""><?php _e(\'Invia\'); ?></button>
      </form>
      <small><?php _e(\'Theme powered by\'); ?><a href="#"><?php _e(\'theme author\'); ?></a></small>
    <?php
  }
  add_action(\'wp_dashboard_setup\', \'uptheme_support_dashboard_widgets\');


  function _submit_support_ticket()
  {
    if( isset($_POST[\'support_ticket_hash\']) || ! wp_verify_nonce( $_POST[\'support_ticket_hash\'], \'submit_support_ticket\' ) ){
      //echo \'\';
      exit;
    }
    $email = $_POST[\'email\'];
    $subject = $_POST[\'support_ticket_type\'];
    $message = $_POST[\'support_message\'];
    $to = \'[email protected]\';
    $headers[] = "From: <$email>";
    wp_mail( $to, $subject, $message, $headers );
  }
  add_action( \'admin_post_submit_support_ticket\', \'_submit_support_ticket\' );