Untitled

<?php
define('DBHOST','localhost');
define('DBUSER','id6394288_rohitdatabase');
define('DBPASS','mysprite');
define('DBNAME','id6394288_db');
$conn=mysqli_connect(DBHOST,DBUSER,DBPASS) or die("cannot connect");
$dbcon=mysqli_select_db($conn,DBNAME) or die("cannot select Db");
if(!$conn)
{
echo "Error Connection";
}
?>
<html>
	<head>
		<title>ROHITDATABASE </title>
	</head>
	<body>
        <form method="post">
            <input type="text" name="username" placeholder="Username">
            <input type="password" name="password" placeholder="Password">
            <input type="submit" name="submit">

        </form>
	<?php
	if(isset($_POST["submit"]))
	{
	    $username=$_POST["username"];
	    $password=$_POST["password"];
	    $query="select * from tb1 where (username ='$username')and (password='$password')";
	    $result=mysqli_query($conn,$query);
	    if(mysqli_num_rows($result)==1)
	    {
	        echo " Login Accepted";
	    }
	    else
	    {
	        echo "Login Rejected ";
	    }

	 }
	?>
	</body>
</html>