<?php

define('DB_HOST', 'localhost');
define('DB_NAME', 'practice');
define('DB_USER','root');
define('DB_PASSWORD','');

$con=mysql_connect(DB_HOST,DB_USER,DB_PASSWORD) or die("Failed to connect to MySQL: " . mysql_error());
$db=mysql_select_db(DB_NAME,$con) or die("Failed to connect to MySQL: " . mysql_error());


function NewUser()
{
    $fullname = $_POST['name'];
    $userName = $_POST['user'];
    $email = $_POST['email'];
    $password =  $_POST['pass'];
    $query = "INSERT INTO websiteusers (fullname,userName,email,pass) VALUES ('$fullname','$userName','$email','$password')";
    $data = mysql_query ($query)or die(mysql_error());
    if($data)
    {
    echo "YOUR REGISTRATION IS COMPLETED...";
    }
}

function SignUp()
{
if(!empty($_POST['user']))   //checking the 'user' name which is from Sign-Up.html, is it empty or have some text
{
    $query = mysql_query("SELECT * FROM websiteusers WHERE userName = '$_POST[user]' AND pass = '$_POST[pass]'") or die(mysql_error());

    if(!$row = mysql_fetch_array($query) or die(mysql_error()))
    {
        newuser();
    }
    else
    {
        echo "SORRY...YOU ARE ALREADY REGISTERED USER...";
    }
}
}
if(isset($_POST['submit']))
{
    SignUp();
}
?>