$array2=array();
while($row2 = mysqli_fetch_array($rr2, MYSQLI_NUM))
{ foreach ($row2 as $ke1 => $value2) {
$array2[]=$value2;
}
}
var_dump($array2);
$sql = "SELECT two, three, four FROM table";
$result = $mysqli->query($sql);
$array2 = $result->fetch_row();