<?php
    define('HOST','mysql.hostinger.in');
    define('USER','u320657157_kumbh');
    define('PASS','#pass');
    define('DB','u320657157_kumbh');

    $con = mysqli_connect(HOST,USER,PASS,DB) or die('Unable to Connect');

<?php
if($_SERVER['REQUEST_METHOD']=='POST'){
        $name = $_POST['name'];
        $username = $_POST['username'];
        $password = $_POST['password'];
        $email = $_POST['email'];

        if($name == '' || $username == '' || $password == '' || $email == ''){
            echo 'please fill all values';
        }else{
            require_once('dbConnect.php');
            $sql = "SELECT * FROM users WHERE username='$username' OR email='$email'";

            $check = mysqli_fetch_array(mysqli_query($con,$sql));

            if(isset($check)){
                echo 'username or email already exist';
            }else{
                $sql = "INSERT INTO users (name,username,password,email) VALUES('$name','$username','$password','$email')";
                if(mysqli_query($con,$sql)){
                    echo 'successfully registered';
                }else{
                    echo 'oops! Please try again!';
                }
            }
            mysqli_close($con);
        }
}else{
echo 'error';
}