<?php
        require ('connect.php');
        var_dump($_POST);
        if (isset($_POST['username']) && isset($_POST['password'])) {
            $username = $_POST['username'];
            $email = $_POST['email'];
            $password = $_POST['password'];

            $query = "INSERT INTO users (username, email, password) VALUES ('$username', '$email', '$password')";
            $result = mysqli_query($connection, $query);

            if ($result) {
                $smsg = "Регистрация прошла успешно";
            } else
            {
                $fsmsg = "Ошибка!";
            }
        }
    ?>