<?php

$firstName = $_POST['first_name'];
$lastName = $_POST['last_name'];
$email = $_POST['email'];
$password = password_hash($_POST['password'], PASSWORD_BCRYPT);

$query = "insert into users(first_name, last_name, email, password )
values('$firstName', '$lastName', '$email', '$password')";

$connection = mysqli_connect('localhost', 'root', '', 'worldcup');
mysqli_query($connection, $query);

echo "User successfully signed up";