Codice PHP:
if(!isset($_POST['submit'])){

$result mysql_query("SELECT * FROM ".$_CONFIG['table_utenti']."")or die(mysql_error());
echo 
"<form action=".$_SERVER['PHP_SELF']." method=post>";

while (
$row mysql_fetch_array($result)) {
echo 
"<input type=checkbox name=check[] value=".$row['id'].">".ucfirst($row['username'])."
"
;

}
echo 
"<input type=submit name=submit value=Elimina></form>";

}else{
//echo count($_POST['delete']);


$query "DELETE FROM ".$_CONFIG['table_utenti']." WHERE id IN (".implode(","$_POST['check']).")";
echo 
$query