<?php

//register php

error_reporting(0);

$regUsername = $_POST['reg-username'];
$regEmail = $_POST['reg-email'];
$regPassword = $_POST['reg-password'];

if(isset($regUsername) && isset($regEmail) && isset($regPassword)){
        $connect = mysql_connect('localhost', 'root', '');
        $selectDB = mysql_select_db('supermazad');
        $query = mysql_query("INSERT INTO users (username, email, password) VALUES ('$regUsername', '$regEmail', '$regPassword')");
        $checkIfSame = mysql_query("SELECT * FROM users WHERE username AND email LIKE '$query' ");
        echo '<h1 class="successMessage">You have successfully registered!</h1>';
}
            if($regUsername || $regEmail == $checkIfSame){
            echo '<h1 class="errorMessage">The username or e-mail already exists.</h1>';
        }

?>