9. header.php

<?php
//載入XOOPS主設定檔（必要）
include_once "../../mainfile.php";
//載入自訂的共同函數檔
include_once "function.php";
//載入工具選單設定檔（亦可將 interface_menu.php 的內容複製到此檔下方，並刪除 interface_menu.php）
include_once "interface_menu.php";

if($xoopsUser and !isset($_SESSION['uid_signup'])){
  $uid=$xoopsUser->uid();
  $tbl=$xoopsDB->prefix('signups');
  $sql="SELECT `action_id` FROM `{$tbl}` WHERE `uid`='{$uid}'";
  $result = $xoopsDB->query($sql) or web_error($sql);
  $uid_signup=[];
  // while(list($action_id)=$xoopsDB->fetchRow($result)){
  //     $uid_signup[]=$action_id;
  // }
  while($data=$xoopsDB->fetchArray($result)){
      $uid_signup[]=$data['action_id'];
  }
  $_SESSION['uid_signup']=$uid_signup;
}

// var_export($_SESSION['uid_signup']);