class SubmissionDAO { private $db; public function __construct($db) { $this->db = $db; } public function getSubmissionDAO($id) { // Retrieve a specific submission from the database using the given ID $sql = "SELECT * FROM submissions WHERE id = ?"; $stmt = $this->db->prepare($sql); $stmt->bindValue(1, $id); $stmt->execute(); $result = $stmt->fetch(PDO::FETCH_ASSOC); return $result; } // Other methods for adding/updating submissions would be defined here }In this example, the constructor for the SubmissionDAO class takes a database connection object as its argument, which could be an instance of a PDO object, for example. The getSubmissionDAO() method takes an ID as its argument and uses a prepared statement to query the database for a submission with that ID. The result is returned as an associative array. The package or library containing this code would likely provide additional methods and functionality for working with submissions in a database, including things like inserting new submissions, updating existing ones, and handling any errors or exceptions that might occur. Additionally, there might be other DAO classes for working with other entities in the system.