<?php
include("../includes/connect.php");
$query = "SELECT * FROM city";
if ($result = $db->query($query)) 
{
  echo "<select name=\"select\">";
  while ($row = $result->fetch_assoc()) 
  {
    $name = $row['city_name'];
    echo "<option>$name</option>";
  }
  echo "</select>";
  $result->free();
}
$db->close();
?>