Use PHP's PDO (PHP Data Objects) for database connections to make the code more professional and secure.
$query = "INSERT INTO votes (user_id, candidate_id) VALUES ('$user_id', '$candidate_id')"; $result = mysqli_query($conn, $query); Use PHP's PDO (PHP Data Objects) for database
Integrated logic to prevent duplicate votes from the same account or ID. candidate_id) VALUES ('$user_id'
?>
if(!$conn) die("Connection failed: " . mysqli_connect_error()); $result = mysqli_query($conn
?>