PHP PDO Pagination not refreshed - php

Question

im quite new to PHP and im trying to make a pagination, the code works! but i need to click on the button twice to make the page refreshed/change. how do i fix this?
view/main/user/userlist.php
<?php
$_SESSION['pagelim'] = 10;
$_SESSION['page'] = $_GET['halaman'];
if ($_SESSION['page'] == '') {
$_SESSION['pos'] = 0;
$_SESSION['page'] = 1;
} else {
$_SESSION['pos'] = ($_SESSION['page']- 1) * $_SESSION['pagelim'];
}
$itemcount = listpetugas::getlisted();
$pagecount = ceil(listpetugas::getlisted()/$_SESSION['pagelim']);
for ($i=1;$i<=$pagecount;$i++)
{ ?>
<?php
if ($i!=$pagecount){
echo " <ul class='pagination'><li><a href='?controller=main&action=userlist&halaman=$i' onclick='myFunction()'>$i</a></li></ul>";?>
<?php }
else{
echo "$i";
} ?>
<?php } ?>
model/userdb.php
public static function listemup()
{
if ($_SESSION['pos'] =='' && $_SESSION['pagelim'])
{
$pos = 0;
$lim = 10;
}
else {
$pos = $_SESSION['pos'];
$lim = $_SESSION['pagelim'];
}
$list = [];
$db = FirstFire::StartConnection();
$req = $db->query("SELECT * FROM randomity LIMIT $pos,$lim");
$rowcount = $req->rowCount();
foreach ($req->fetchAll() as $post) {
$list[] = new listpetugas($post['name'],$post['email'],$post['adress'],$post['wow']);
}
return $list;
}
JS
<script>
function myFunction() {
location.reload();
}
</script>
sorry for the messy code.