non verificato, + o -
codice:
<?
mysql_connect($DBhost,$DBuser,$DBpass) or die("Timeout Server connection ");
@mysql_select_db("$DBName") or die("MySQL databse unavailable$DBName."); 
$sqlquery = "SELECT id, data, username, username_password, email FROM $table";
$result = mysql_query($sqlquery) or die(mysql_error());
if(mysql_num_rows($result) > 0) {
    echo "<form action=\"delete.php\" method=\"post\">";
    while(list($id, $data, $username, $password, $email) = mysql_fetch_row($result) {
         echo "
               #id:$id

               Data creazione: $data

               User: $username

               Pass: $password

               Email: $email</p>

               <input type=\"checkbox\" name=\"del_id[]\" value=\"$id\">

              ";

    }
    echo "<input type=\submit\" name=\"cancella\" value=\"cancella i valori selezionati\">";
          </form>";
} else {
    echo "Tabella vuota";
}
?>
delete.php
codice:
<?
if(isset($_POST['del_id']) && is_array($_POST['del_id']) && count($_POST['del_id']) > 0) {
      $query = "DELETE FROM tabella WHERE id IN (".implode(", ", $_POST['del_id']).")";
      // conn
      // sel
      mysql_query($query);
} else {
     echo "NOn sono stati selezionati record";
}
?>