Code:
<?php
error_reporting(E_ALL ^ E_NOTICE);
$con=mysql_connect("localhost", "root", "");
mysql_select_db("registration", $con);   

if(isset($_REQUEST['submit']))
{
$username    = $_POST['name'];
$lname       = $_POST['lname'];         
$email       = $_POST['email'] ;        
$password    = $_POST['password'];         
$gender      = $_POST['gender'];
...