<?php

$user = 'root';
$password = 'root';
$db = 'inventory';
$host = 'localhost';
$port = 8888;

$link = mysqli_init();
$success = mysqli_real_connect(
   $link,
   $host,
   $user,
   $password,
   $db,
   $port
);

?>
<?php
$username = $_POST['username'];
$password = $_POST['password'];
$sql = mysql_query("SELECT * FROM login WHERE username = '".$_POST['username']."' and password = '".md5($_POST['password'])."'");
$row = mysql_num_rows($sql);
if($rom > 0 )
{
  session_start();
  $_SESSION['username'] = $_POST['username'];
  $_SESSION['password'] = $_POST['password'];
  echo "login done";
}else {
  echo "fail login ";
}
?>