{paginate_middle} in PHP Smarty pagination not working properly - php

Question

I'm using smarty pagination My pagination URL look like this
categories.php?id=1&next=3
Now {paginate_prev} & {paginate_next} is working properly
but {paginate_middle} is stripping ID parameter it is generating url like this
categories.php?next=3
My pagination code is here
function get_db_results() {
global $conn;
$id = htmlspecialchars((int)$_GET['id']);
if ($id){
$_query = sprintf('SELECT SQL_CALC_FOUND_ROWS * FROM newser where idblog = '.$conn->qstr($id).' and (main = '.$conn->qstr('0').' or main = '.$conn->qstr('2').') ORDER BY blogid DESC LIMIT %d,%d',
SmartyPaginate::getCurrentIndex(),SmartyPaginate::getLimit());
}
else
{
$_query = sprintf('SELECT SQL_CALC_FOUND_ROWS * FROM newser where (main = '.$conn->qstr('0').' or main = '.$conn->qstr('2').') ORDER BY blogid DESC LIMIT %d,%d',
SmartyPaginate::getCurrentIndex(),SmartyPaginate::getLimit());
}
$brecordSet = $conn->Execute($_query);
if(!$brecordSet)
print $conn->ErrorMsg();
else
while(!$brecordSet->EOF) {
$_data[] = $brecordSet->GetRowAssoc(false);
$brecordSet->MoveNext();
}
$_query = "SELECT FOUND_ROWS() as total";
$crecordSet = $conn->Execute($_query);
if(!$crecordSet)
print $conn->ErrorMsg();
else
$_row = $crecordSet->GetRowAssoc();
$total = $crecordSet->fields['total'];
SmartyPaginate::setTotal($total);
return #$_data;
$brecordSet->Close();
$crecordSet->Close();
}
require ('libs/SmartyPaginate.class.php');
SmartyPaginate::connect();
SmartyPaginate::setLimit(4);
SmartyPaginate::setUrl('categories.php');
$smarty->caching = $caching;
$smarty->assign('results',get_db_results());
SmartyPaginate::assign($smarty);
$id = htmlspecialchars((int)$_REQUEST['id']);
#$next = htmlspecialchars((int)$_REQUEST['next']);
$cid = $id.$next;
$smarty->display('categories.php',$cid);
Please help me understand if there is any problem with my code or it a bug with smarty {paginate_middle} which is not handeling multiple parameters

Answer 1

I don't use SmartyPaginate at all but it seems you should change at least this line:
SmartyPaginate::setUrl('categories.php');
into
SmartyPaginate::setUrl('categories.php?id=1');