Eliminate SQL injection risks by routing query requests through explicitly bound statements using prepare() and execute() .
| Column | Type | Description | |--------------|--------------|--------------------------------| | id | int(11) | Primary key | | voter_id | int(11) | Foreign key to users.id | | candidate_id | int(11) | Foreign key to candidates.id | | vote_date | datetime | Timestamp of vote |
: Open the project's database configuration file (often config.php , db.php , or .env ) and ensure the database name, username ( root ), and password (empty by default in XAMPP) are correct.
CREATE DATABASE voting_system; USE voting_system; -- Users table for both voters and administrators CREATE TABLE users ( id INT AUTO_INCREMENT PRIMARY KEY, fullname VARCHAR(100) NOT NULL, email VARCHAR(100) UNIQUE NOT NULL, voter_id VARCHAR(50) UNIQUE NOT NULL, password VARCHAR(255) NOT NULL, role ENUM('voter', 'admin') DEFAULT 'voter', status ENUM('active', 'voted') DEFAULT 'active', created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ); -- Candidates table CREATE TABLE candidates ( id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(100) NOT NULL, party VARCHAR(100) NOT NULL, photo VARCHAR(255) DEFAULT 'default.png', votes_count INT DEFAULT 0 ); -- Audit trail for votescast (Prevents double voting) CREATE TABLE votes ( id INT AUTO_INCREMENT PRIMARY KEY, voter_id INT NOT NULL, candidate_id INT NOT NULL, voted_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, FOREIGN KEY (voter_id) REFERENCES users(id), FOREIGN KEY (candidate_id) REFERENCES candidates(id) ); Use code with caution. Step-by-Step Backend Implementation 1. Database Connection ( db.php )
The system had three main user roles:
-- Table: voters CREATE TABLE voters ( id INT AUTO_INCREMENT PRIMARY KEY, voter_id VARCHAR(20) UNIQUE, name VARCHAR(100), email VARCHAR(100), password VARCHAR(255), has_voted BOOLEAN DEFAULT FALSE, election_id INT, FOREIGN KEY (election_id) REFERENCES elections(id) );
If you search for a complete project, here is the format:
: https://github.com/Yashodha-Bhosle/online-voting-system
When developing a project like this, it's crucial to understand the standard functionalities that make it a complete solution. Based on several top-tier GitHub projects, here are the core features you can expect to implement or find in the source code: Eliminate SQL injection risks by routing query requests
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: Execute the SQL schema script inside phpMyAdmin to build the tables.
This page dynamically renders active electoral positions and candidates, filtering out users who have already voted.
| Feature | Description | |---------|-------------| | 🔐 | Secure registration and login for voters and administrators | | ✅ One Vote Per Voter | Prevents duplicate voting, ensuring fair election results | | 🗳️ Real-Time Results | Automatic vote counting and real-time result display | | 🖼️ Candidate Management | Admin functionality to add, edit, or delete candidates with image uploads | | 📊 Result Visualization | Interactive charts and statistics to display voting patterns | | 📧 Email Notifications | Automated confirmations and alerts using PHPMailer | | 📄 PDF Report Generation | Export election results in PDF format for record-keeping | | 👥 Role-Based Access | Separate interfaces for voters and administrators | Step-by-Step Backend Implementation 1
: Often hosted by platforms like itsourcecode, this version usually comes with a step-by-step setup guide and a database schema (SQL file).
else echo "You have already voted!";
// Increment candidate vote count $increment = $pdo->prepare("UPDATE candidates SET vote_count = vote_count + 1 WHERE id = ?"); $increment->execute([$candidate_id]);