OverLord Shell

<?php session_start();
require_once("db/conn.php");

$city="";
if(isset($_POST['city']))$city=$_POST['city'];

 $cityq="SELECT * FROM otms_states_cities WHERE statesrno='".$_POST['state']."' ORDER BY city";
$cityr=$conn->query($cityq);
?>
<option value="">Select</option>
<?php
while($cityrow=$cityr->fetch_assoc()){
?>
<option value="<?php echo $cityrow['citysrno']?>"<?php if($cityrow['citysrno']==$city)echo " selected"?>><?php echo $cityrow['city']?></option>
<?php
}
$cityr->free();
$conn->close();
?>