<?php
$stmt=$pdo->query('SELECT COUNT(*) as count FROM users WHERE lu>= ' . $last . ' ');
$count=$stmt->fetch(PDO::FETCH_ASSOC);
while ($online = $stmt->fetch(PDO::FETCH_ASSOC)) {
echo "<dv class='tblock'>
<a href='user$online[id]'>$online[login]</a>, $online[lvl]<br>
</div>";
}
?>
<?php
$stmt = $pdo->query('SELECT * FROM users WHERE lu>= ' . $last . ' ');
$online = $stmt->fetchAll();
foreach ($online as $onl) {
echo $onl['login'];
}