In PHP development, what are the advantages of using a database adapter to manage database connections and interactions, as opposed to handling them within individual classes?

Using a database adapter in PHP development allows for better separation of concerns by centralizing database connection management and interactions. This approach promotes code reusability, scalability, and easier maintenance. By encapsulating database operations within a dedicated adapter class, it becomes easier to switch between different database systems or make changes to the connection logic without affecting the rest of the application. 

class DatabaseAdapter {
    private $connection;

    public function __construct($host, $username, $password, $database) {
        $this->connection = new mysqli($host, $username, $password, $database);

        if ($this->connection->connect_error) {
            die("Connection failed: " . $this->connection->connect_error);
        }
    }

    public function query($sql) {
        return $this->connection->query($sql);
    }

    public function close() {
        $this->connection->close();
    }
}

// Example of using the DatabaseAdapter
$db = new DatabaseAdapter('localhost', 'username', 'password', 'database_name');
$result = $db->query('SELECT * FROM users');
while ($row = $result->fetch_assoc()) {
    echo $row['username'] . '<br>';
}
$db->close();

Keywords

database adapter database connections interactions PHP development classes

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