Give real-world project using OOP (like Login System / API)

I’ve created a complete real-world PHP OOP Login System API project in the canvas 👉

What this project includes:

• ✅ OOP structure (Database + User class)
• ✅ Secure password hashing (password_hash)
• ✅ Login with password_verify
• ✅ REST API (register & login)
• ✅ JSON responses (ready for frontend / mobile app)
• ✅ PDO (secure DB handling)

---

🚀 How to use this project:

1. Create Database

• Create DB: test_db
• Run the SQL (already included at bottom of code)

2. Run API

Put file in:

htdocs/login-api/index.php

3. Test API (Postman / JS)

🔹 Register API

POST http://localhost/login-api/index.php?action=register

Body (JSON):

{
  "name": "Aditya",
  "email": "test@gmail.com",
  "password": "123456"
}

---

🔹 Login API

POST http://localhost/login-api/index.php?action=login

Body:

{
  "email": "test@gmail.com",
  "password": "123456"
}

<?php
// ===============================
// DATABASE CONNECTION (PDO)
// ===============================
class Database {
    private $host = "localhost";
    private $db_name = "test_db";
    private $username = "root";
    private $password = "";
    public $conn;

    public function connect() {
        $this->conn = null;
        try {
            $this->conn = new PDO(
                "mysql:host={$this->host};dbname={$this->db_name}",
                $this->username,
                $this->password
            );
            $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        } catch(PDOException $e) {
            echo "Connection Error: " . $e->getMessage();
        }
        return $this->conn;
    }
}

// ===============================
// USER CLASS (OOP)
// ===============================
class User {
    private $conn;
    private $table = "users";

    public $id;
    public $name;
    public $email;
    public $password;

    public function __construct($db) {
        $this->conn = $db;
    }

    // REGISTER USER
    public function register() {
        $query = "INSERT INTO {$this->table} (name, email, password) VALUES (:name, :email, :password)";
        $stmt = $this->conn->prepare($query);

        $this->password = password_hash($this->password, PASSWORD_DEFAULT);

        $stmt->bindParam(':name', $this->name);
        $stmt->bindParam(':email', $this->email);
        $stmt->bindParam(':password', $this->password);

        return $stmt->execute();
    }

    // LOGIN USER
    public function login() {
        $query = "SELECT * FROM {$this->table} WHERE email = :email LIMIT 1";
        $stmt = $this->conn->prepare($query);
        $stmt->bindParam(':email', $this->email);
        $stmt->execute();

        $row = $stmt->fetch(PDO::FETCH_ASSOC);

        if($row && password_verify($this->password, $row['password'])) {
            return $row;
        }
        return false;
    }
}

// ===============================
// API HANDLER
// ===============================
header("Content-Type: application/json");

$db = (new Database())->connect();
$user = new User($db);

$action = $_GET['action'] ?? '';

if($action === 'register') {
    $data = json_decode(file_get_contents("php://input"));

    $user->name = $data->name;
    $user->email = $data->email;
    $user->password = $data->password;

    if($user->register()) {
        echo json_encode(["status" => "success", "message" => "User registered"]);
    } else {
        echo json_encode(["status" => "error", "message" => "Registration failed"]);
    }
}

if($action === 'login') {
    $data = json_decode(file_get_contents("php://input"));

    $user->email = $data->email;
    $user->password = $data->password;

    $result = $user->login();

    if($result) {
        echo json_encode(["status" => "success", "user" => $result]);
    } else {
        echo json_encode(["status" => "error", "message" => "Invalid credentials"]);
    }
}

// ===============================
// SQL TABLE
// ===============================
/*
CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100),
    email VARCHAR(100) UNIQUE,
    password VARCHAR(255)
);
*/

?>