"undefined variable" error

PHP
10

i think i am correct.
the code is calling on polls not users.

<?php
require_once 'init.php';
$pollsQuery = $db->query("
	SELECT id, question
	FROM polls
	WHERE DATE(NOW()) BETWEEN starts AND ends
	
");
var_dump($pollsQuery);
while($row = $pollsQuery->fetchObject()){
	$polls[] = $row;
}
echo '<pre>',  print_r($polls) ,'</pre>';
?>

& in init i am accessing the correct db

<?php
session_start();
$_SESSION['user_id'] = 1;

$db = new PDO('mysql:host=localhost; dbname=website', 'root', '');
?>