process-signup.php

<?php
require_once 'config.php';

$name = $_POST['name'];
$email = $_POST['email'];
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);

$sql = "INSERT INTO customers (name, email, password) VALUES (?, ?, ?)";
$stmt = $conn->prepare($sql);
$stmt->bind_param("sss", $name, $email, $password);

if ($stmt->execute()) {
    header("Location: login.html");
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;
}

$stmt->close();
$conn->close();
?>