addairframe.php

<?php
session_start();
include 'db_conn.php';

$sr = "localhost";
$username = "root";
$password = "";
$dbname = "test_db";

$con = mysqli_connect($sr,$username,$password,$dbname);

if (isset($_POST['submit'])) 
{
    if (!empty($_POST['af_nam']) && !empty($_POST['af_num']) ) 
    {
        $af_nam = $_POST['af_nam'];
        $af_num = $_POST['af_num'];

        $query = "insert into airframe(af_name, af_num) values('$af_nam', '$af_num')";

        $run = mysqli_query($con,$query);

        if ($run) 
        {
            echo "Air Frame Added";
        }else {
            echo "Fail to add Air Frame";
        }
    }else 
    {
        echo "All fields require";
    }
}