How can one effectively handle database connections in PHP classes?

To effectively handle database connections in PHP classes, it is recommended to create a separate class specifically for managing database connections. This class can include methods for establishing connections, executing queries, and closing connections. By encapsulating database connection logic within a dedicated class, it helps to improve code organization, reusability, and maintainability. 

class Database {
    private $host = 'localhost';
    private $username = 'root';
    private $password = '';
    private $dbname = 'example';

    private $conn;

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

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

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

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

// Example of using the Database class
$db = new Database();
$result = $db->query("SELECT * FROM users");
while ($row = $result->fetch_assoc()) {
    echo "Name: " . $row['name'] . "<br>";
}
$db->close();

Keywords

PHP database connections classes PDO error handling

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