// Set up database connection $dsn = 'mysql:host=localhost;dbname=mydb'; $username = 'myuser'; $password = 'mypassword'; $options = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION); try { $db = new PDO($dsn, $username, $password, $options); } catch (PDOException $e) { echo "Connection failed: " . $e->getMessage(); } // Retrieve users from database $sql = "SELECT * FROM users WHERE location = :loc AND interests = :int"; $stmt = $db->prepare($sql); $stmt->bindParam(':loc', $location); $stmt->bindParam(':int', $interests); $stmt->execute(); // Store user data in array $users = array(); while ($row = $stmt->fetch()) { $users[] = $row; }In this example, the User select query retrieves all users from a database where the location and interests of each user match specified criteria. The resulting user data is then stored in an array for further processing. The package library used in this example is PDO, which provides a lightweight database abstraction layer for PHP applications. Other popular PHP database libraries include mysqli and Doctrine ORM.