Expense Tracker App Project In Php

Creating an Expense Tracker App involves several components, including a MySQL database schema, file structure, layout design using Bootstrap 5, and complete PHP scripts for user authentication and management. Below is a comprehensive guide to help you set up your system.

Project Introduction

The Expense Tracker is a web application designed to help users manage their finances effectively. This platform allows users to track their income sources, expenses, budgets, and savings goals in a user-friendly interface. With features for notifications and reporting, the system aims to provide users with insights into their financial habits and help them achieve their financial objectives.

Project Objectives

To develop a secure and intuitive platform for users to manage their personal finances.
To implement a comprehensive database schema that supports user management, income tracking, expense logging, and budget planning.
To provide functionalities for setting and tracking savings goals to encourage financial discipline.
To facilitate notifications for important financial reminders and updates.
To create a responsive design that enhances user experience across various devices.
To generate reports that provide insights into spending patterns and financial health.

Project Modules

User Management: Handles user registration, authentication, and profile management.
Income Management: Allows users to add, edit, and track their income sources, including amounts and frequencies.
Expense Management: Facilitates the logging and categorization of expenses, including transaction dates and notes.
Budget Management: Enables users to set budgets for different categories and track their spending against these budgets.
Savings Goals Management: Allows users to set savings goals, track progress, and manage target amounts and due dates.
Notification System: Sends alerts and reminders to users regarding important financial activities and deadlines.
Reporting: Generates reports that provide insights into income, expenses, budgets, and savings to help users make informed financial decisions.

1. MySQL Database Schema


CREATE DATABASE expense_tracker;
USE expense_tracker;
-- Table for users
CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    email VARCHAR(100) NOT NULL UNIQUE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);
-- Table for income sources
CREATE TABLE income_sources (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id `INT` NOT NULL,
    source_name VARCHAR(100) NOT NULL,
    amount DECIMAL(10, 2) NOT NULL,
    frequency ENUM('one-time', 'monthly', 'weekly', 'yearly') DEFAULT 'one-time',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);
-- Table for expenses
CREATE TABLE expenses (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id `INT` NOT NULL,
    category VARCHAR(100) NOT NULL,
    amount DECIMAL(10, 2) NOT NULL,
    transaction_date `DATE` NOT NULL,
    notes VARCHAR(255),
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);
-- Table for budgets
CREATE TABLE budgets (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id `INT` NOT NULL,
    category VARCHAR(100) NOT NULL,
    budget_amount DECIMAL(10, 2) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);
-- Table for savings goals
CREATE TABLE savings_goals (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id `INT` NOT NULL,
    goal_name VARCHAR(100) NOT NULL,
    target_amount DECIMAL(10, 2) NOT NULL,
    current_amount DECIMAL(10, 2) DEFAULT 0,
    due_date `DATE` NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);
-- Table for notifications
CREATE TABLE notifications (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id `INT` NOT NULL,
    message VARCHAR(255) NOT NULL,
    is_read TINYINT(1) DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

2. File and Folder Structure


expense_tracker/
│
├── config/
│   └── db.php
│
├── public/
│   ├── index.php
│   ├── login.php
│   ├── register.php
│   ├── dashboard.php
│   ├── income.php
│   ├── expenses.php
│   ├── budgets.php
│   ├── savings_goals.php
│   ├── notifications.php
│   └── reports.php
│
├── includes/
│   ├── header.php
│   ├── footer.php
│   └── functions.php
│
├── assets/
│   ├── css/
│   │   └── styles.css
│   ├── js/
│   │   └── scripts.js
│   └── images/
│
└── vendor/
    └── (Bootstrap and other libraries)

3. Layout Based Design with Bootstrap 5

Header (includes/header.php)


<!DOCTYPE html>
<html lang=`en`>
<head>
    <meta charset=`UTF-8`>
    <meta name=`viewport` content=`width=device-width, initial-scale=1.0`>
    <link href=`https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css` rel=`stylesheet`>
    <link rel=`stylesheet` href=`assets/css/styles.css`>
    <title>Expense Tracker</title>
</head>
<body>
    <div class=`container`>
        <header class=`my-4`>
            <h1>Expense Tracker</h1>
        </header>
        <nav class=`navbar navbar-expand-lg navbar-light bg-light`>
            <div class=`container-fluid`>
                <a class=`navbar-brand` href=`index.php`>Home</a>
                <button class=`navbar-toggler` type=`button` data-bs-toggle=`collapse` data-bs-target=`#navbarNav` aria-controls=`navbarNav` aria-expanded=`false` aria-label=`Toggle navigation`>
                    <span class=`navbar-toggler-icon`></span>
                </button>
                <div class=`collapse navbar-collapse` id=`navbarNav`>
                    <ul class=`navbar-nav`>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`income.php`>Income</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`expenses.php`>Expenses</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`budgets.php`>Budgets</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`savings_goals.php`>Savings Goals</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`notifications.php`>Notifications</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`reports.php`>Reports</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`login.php`>Login</a>
                        </li>
                        <li class=`nav-item`>
                            <a class=`nav-link` href=`register.php`>Register</a>
                        </li>
                    </ul>
                </div>
            </div>
        </nav>
        <main class=`my-4`>

Footer (includes/footer.php)


        </main>
        <footer class=`text-center my-4`>
            <p>© 2023 Expense Tracker. All rights reserved.</p>
        </footer>
    </div>
    <script src=`https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js`></script>
</body>
</html>

4. PHP Code for User Authentication

Registration (public/register.php)


<?php
require '../config/db.php';
require '../includes/header.php';
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $username = $_POST['username'];
    $email = $_POST['email'];
    $password = password_hash($_POST['password'], PASSWORD_DEFAULT);
    $stmt = $conn->prepare(`INSERT INTO users (username, email, password) VALUES (?, ?, ?)`);
    $stmt->bind_param(`sss`, $username, $email, $password);
    $stmt->execute();
    $stmt->close();
    header(`Location: login.php`);
}
?>
<form method=`POST` action=``>
    <div class=`mb-3`>
        <label for=`username` class=`form-label`>Username</label>
        <input type=`text` class=`form-control` id=`username` name=`username` required>
    </div>
    <div class=`mb-3`>
        <label for=`email` class=`form-label`>Email</label>
        <input type=`email` class=`form-control` id=`email` name=`email` required>
    </div>
    <div class=`mb-3`>
        <label for=`password` class=`form-label`>Password</label>
        <input type=`password` class=`form-control` id=`password` name=`password` required>
    </div>
    <button type=`submit` class=`btn btn-primary`>Register</button>
</form>
<?php require '../includes/footer.php'; ?>


<?php
session_start();
require '../config/db.php';
require '../includes/header.php';
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $username = $_POST['username'];
    $password = $_POST['password'];
    $stmt = $conn->prepare(`SELECT * FROM users WHERE username = ?`);
    $stmt->bind_param(`s`, $username);
    $stmt->execute();
    $result = $stmt->get_result();
    $user = $result->fetch_assoc();
    if ($user && password_verify($password, $user['password'])) {
        $_SESSION['user_id'] = $user['id'];
        header(`Location: dashboard.php`);
    } else {
        echo `Invalid credentials.`;
    }
}
?>
<form method=`POST` action=``>
    <div class=`mb-3`>
        <label for=`username` class=`form-label`>Username</label>
        <input type=`text` class=`form-control` id=`username` name=`username` required>
    </div>
    <div class=`mb-3`>
        <label for=`password` class=`form-label`>Password</label>
        <input type=`password` class=`form-control` id=`password` name=`password` required>
    </div>
    <button type=`submit` class=`btn btn-primary`>Login</button>
</form>
<?php require '../includes/footer.php'; ?>

5. Additional PHP Scripts

Dashboard (public/dashboard.php)


<?php
session_start();
require '../config/db.php';
require '../includes/header.php';
if (!isset($_SESSION['user_id'])) {
    header(`Location: login.php`);
    exit();
}
$user_id = $_SESSION['user_id'];
$stmt = $conn->prepare(`SELECT * FROM users WHERE id = ?`);
$stmt->bind_param(`i`, $user_id);
$stmt->execute();
$result = $stmt->get_result();
$user = $result->fetch_assoc();
?>
<h2>Welcome, <?php echo $user['username']; ?></h2>
<p>Your email: <?php echo $user['email']; ?></p>
<?php require '../includes/footer.php'; ?>

Income Management (public/income.php)


<?php
session_start();
require '../config/db.php';
require '../includes/header.php';
if (!isset($_SESSION['user_id'])) {
    header(`Location: login.php`);
    exit();
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $source_name = $_POST['source_name'];
    $amount = $_POST['amount'];
    $frequency = $_POST['frequency'];
    $stmt = $conn->prepare(`INSERT INTO income_sources (user_id, source_name, amount, frequency) VALUES (?, ?, ?, ?)`);
    $stmt->bind_param(`isss`, $_SESSION['user_id'], $source_name, $amount, $frequency);
    $stmt->execute();
    $stmt->close();
    header(`Location: income.php`);
}
?>
<h2>Manage Income</h2>
<form method=`POST` action=``>
    <div class=`mb-3`>
        <label for=`source_name` class=`form-label`>Source Name</label>
        <input type=`text` class=`form-control` id=`source_name` name=`source_name` required>
    </div>
    <div class=`mb-3`>
        <label for=`amount` class=`form-label`>Amount</label>
        <input type=`number` class=`form-control` id=`amount` name=`amount` required>
    </div>
    <div class=`mb-3`>
        <label for=`frequency` class=`form-label`>Frequency</label>
        <select class=`form-select` id=`frequency` name=`frequency` required>
            <option value=`one-time`>One-time</option>
            <option value=`monthly`>Monthly</option>
            <option value=`weekly`>Weekly</option>
            <option value=`yearly`>Yearly</option>
        </select>
    </div>
    <button type=`submit` class=`btn btn-primary`>Add Income</button>
</form>
<h3>Existing Income Sources</h3>
<table class=`table`>
    <thead>
        <tr>
            <th>ID</th>
            <th>Source Name</th>
            <th>Amount</th>
            <th>Frequency</th>
        </tr>
    </thead>
    <tbody>
        <?php
        $stmt = $conn->prepare(`SELECT * FROM income_sources WHERE user_id = ?`);
        $stmt->bind_param(`i`, $_SESSION['user_id']);
        $stmt->execute();
        $result = $stmt->get_result();
        while ($income = $result->fetch_assoc()): ?>
        <tr>
            <td><?php echo $income['id']; ?></td>
            <td><?php echo $income['source_name']; ?></td>
            <td><?php echo $income['amount']; ?></td>
            <td><?php echo $income['frequency']; ?></td>
        </tr>
        <?php endwhile; ?>
    </tbody>
</table>
<?php require '../includes/footer.php'; ?>

Expense Management (public/expenses.php)


<?php
session_start();
require '../config/db.php';
require '../includes/header.php';
if (!isset($_SESSION['user_id'])) {
    header(`Location: login.php`);
    exit();
}
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $category = $_POST['category'];
    $amount = $_POST['amount'];
    $transaction_date = $_POST['transaction_date'];
    $notes = $_POST['notes'];
    $stmt = $conn->prepare(`INSERT INTO expenses (user_id, category, amount, transaction_date, notes) VALUES (?, ?, ?, ?, ?)`);
    $stmt->bind_param(`issss`, $_SESSION['user_id'], $category, $amount, $transaction_date, $notes);
    $stmt->execute();
    $stmt->close();
    header(`Location: expenses.php`);
}
?>
<h2>Manage Expenses</h2>
<form method=`POST` action=``>
    <div class=`mb-3`>
        <label for=`category` class=`form-label`>Category</label>
        <input type=`text` class=`form-control` id=`category` name=`category` required>
    </div>
    <div class=`mb-3`>
        <label for=`amount` class=`form-label`>Amount</label>
        <input type=`number` class=`form-control` id=`amount` name=`amount` required>
    </div>
    <div class=`mb-3`>
        <label for=`transaction_date` class=`form-label`>Transaction Date</label>
        <input type=`date` class=`form-control` id=`transaction_date` name=`transaction_date` required>
    </div>
    <div class=`mb-3`>
        <label for=`notes` class=`form-label`>Notes</label>
        <textarea class=`form-control` id=`notes` name=`notes`></textarea>
    </div>
    <button type=`submit` class=`btn btn-primary`>Add Expense</button>
</form>
<h3>Existing Expenses</h3>
<table class=`table`>
    <thead>
        <tr>
            <th>ID</th>
            <th>Category</th>
            <th>Amount</th>
            <th>Transaction Date</th>
            <th>Notes</th>
        </tr>
    </thead>
    <tbody>
        <?php
        $stmt = $conn->prepare(`SELECT * FROM expenses WHERE user_id = ?`);
        $stmt->bind_param(`i`, $_SESSION['user_id']);
        $stmt->execute();
        $result = $stmt->get_result();
        while ($expense = $result->fetch_assoc()): ?>
        <tr>
            <td><?php echo $expense['id']; ?></td>
            <td><?php echo $expense['category']; ?></td>
            <td><?php echo $expense['amount']; ?></td>
            <td><?php echo $expense['transaction_date']; ?></td>
            <td><?php echo $expense['notes']; ?></td>
        </tr>
        <?php endwhile; ?>
    </tbody>
</table>
<?php require '../includes/footer.php'; ?>