PHP json_encode() in while loop

Question

I am trying to use json_encode() in a while loop while getting database results. Here is my code:

Answer 1

Push each user to an array:

$data = array();
while($row = sqlite_fetch_array($results)) {
  $data[] = $row['uid'] . " " . $row['username'] . " " . $row['xPos'] . " " . $row['yPos'];
}
echo json_encode(array("response"=>$data));