: Use PDO prepared statements across all queries to completely nullify SQL Injection (SQLi) vulnerabilities.
An online voting system built with PHP and MySQL is an excellent project for demonstrating the power of web technologies in solving civic challenges. By making the source code available on platforms like GitHub, developers contribute to a transparent and verifiable democratic process, proving that technology can be a powerful ally in modern governance.
This configuration file establishes a connection to MySQL using PHP Data Objects (PDO). PDO provides superior security over the legacy mysqli extension through native support for prepared statements. : Use PDO prepared statements across all queries
This file uses PDO for secure database connections and gracefully handles connection bugs, allowing the code to be moved across environments smoothly.
CREATE DATABASE IF NOT EXISTS portable_vote_db; USE portable_vote_db; -- Table for system administrators CREATE TABLE admin ( id INT AUTO_INCREMENT PRIMARY KEY, username VARCHAR(50) NOT NULL UNIQUE, password VARCHAR(255) NOT NULL ); -- Table for election positions CREATE TABLE positions ( id INT AUTO_INCREMENT PRIMARY KEY, description VARCHAR(100) NOT NULL, max_vote INT NOT NULL DEFAULT 1 ); -- Table for election candidates CREATE TABLE candidates ( id INT AUTO_INCREMENT PRIMARY KEY, position_id INT NOT NULL, firstname VARCHAR(50) NOT NULL, lastname VARCHAR(50) NOT NULL, photo VARCHAR(150) DEFAULT 'profile.jpg', FOREIGN KEY (position_id) REFERENCES positions(id) ON DELETE CASCADE ); -- Table for registered voters CREATE TABLE voters ( id INT AUTO_INCREMENT PRIMARY KEY, voter_id VARCHAR(50) NOT NULL UNIQUE, password VARCHAR(255) NOT NULL, firstname VARCHAR(50) NOT NULL, lastname VARCHAR(50) NOT NULL, voted_status INT DEFAULT 0 ); -- Table to store anonymized votes CREATE TABLE votes ( id INT AUTO_INCREMENT PRIMARY KEY, voter_id VARCHAR(50) NOT NULL, position_id INT NOT NULL, candidate_id INT NOT NULL, FOREIGN KEY (position_id) REFERENCES positions(id), FOREIGN KEY (candidate_id) REFERENCES candidates(id) ); Use code with caution. 4. Key Source Code Implementation Database Connection ( config/db.php ) This configuration file establishes a connection to MySQL
: In a strict production environment, separate the voter_id link from the actual choice in the votes table using cryptographic tokens. This preserves voter privacy while ensuring that the audit log remains intact. Making the Project Portable
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: Regenerate session identifiers right after authorization checks complete by running session_regenerate_id(true) . AI responses may include mistakes. Learn more Share public link