<?php
include "db.php";
$db = new DB("localhost","root","","medical");
 
 if(!$db->open())
 {
    die($db->error());
 }
 
if(!$db->query("SELECT * FROM test"))
 {
    die($db->error());
 }
print <<<FORMA
<form name="form1" method="POST" action="?action=del">
<table width="310" border="0" cellpadding="1" cellspacing="1" bgcolor="#CCCCCC">
  <!--DWLayoutTable-->
  <tr>
 
FORMA;
 
while($row = $db->fetchArray())
{
print <<<FORMAB
<tr><td width="310" valign="top" bgcolor="#FFFFFF"><input type="checkbox" name="delete_user[]" value="{$row['id']}"><b>{$row['id']}</b><tr>\n</td>
FORMAB;
}
 
print <<<FORMAC
</td>
  </tr>
</table>
  <br>
  <input name="go" type="submit" value="Delete">
  <input type="reset" name="Reset" value="Reset">
</form>
FORMAC;
 

 

@$action = $_GET['action'];
   switch($action) {
 
case "del":
  if(!empty($_POST['go'])){
    foreach(($_POST['delete_user']) AS $id) {
       if(!$db->query("DELETE FROM `test` WHERE `id` = '".$id."'"))
       {
       die($db->error());
       }
    }
    }
break;
 
 }
$db->freeResult();
$db->close();
 
?>

  echo "<meta http-equiv='Refresh' content='0, URL=Kuda nado'>":
 

 
    foreach(($_POST['delete_user']) AS $id) { // <- тут так
 
       if(!$db->query("DELETE FROM `test` WHERE `id` = '".$id."'"))
       { // <- а сдесь так
 

 

$sql = "DELETE FROM `test` WHERE `id` IN (" . join(',', $_POST['delete_user']) . ")"