<?php


$servername = "172.21.170.15";
$username = "tybca";
$password = "tybca";
$database = "tybca";


$conn = new mysqli($servername, $username, $password);

$result = $conn->query("SELECT student_name FROM student_22");


echo "<select value=''>Student Name";

while ($ary = mysqli_fetch_array($result))
{
     echo "<option value=\"" . $ary['student_name']  . "\">" . $ary ['wad']  . "</option>";
}

 echo "</select>";// Closing of list box