Is there a recommended best practice for handling database connections and queries in PHP classes, considering security and efficiency?

When handling database connections and queries in PHP classes, it is recommended to use prepared statements to prevent SQL injection attacks and ensure data security. Additionally, it is best practice to establish a separate database connection class to handle database connections and queries, promoting code reusability and maintainability. 

<?php
class Database {
    private $host = 'localhost';
    private $username = 'root';
    private $password = '';
    private $dbname = 'mydatabase';
    private $conn;

    public function __construct() {
        $this->conn = new PDO("mysql:host=$this->host;dbname=$this->dbname", $this->username, $this->password);
        $this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    }

    public function query($sql, $params = []) {
        $stmt = $this->conn->prepare($sql);
        $stmt->execute($params);
        return $stmt;
    }
}
?>

Keywords

database connections queries PHP classes security efficiency

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