I'm new to php and am trying to learn oop. I have a simple input that passes the text to a class to sanitize it. I want to be able to insert the text into the database using pdo. I'm not sure if I'm going the correct way with this.

$sanitize = new SanitizeText($category);
//I want the sanitize text in the database.
$newdb = new Database();
class Database {
	private $db_user = 'root';
	private $db_password = 'password';
	private $db_name = 'test';
	private $db_host = 'localhost';
	public $prepare_sql;
	public $execute_sql;

	// Connect to database
	public function __construct() {
		try {
			new PDO('mysql:host=' .$this->db_host. '; dbname=' .$this->db_name, $this->db_user, $this->db_password);
			echo "Connected to database"; 
		catch (PDOException $e) {
			echo "Could not connect to database";	
	// Insert data.. not sure if this is proper
	public function create() {

		$stmt = $this->prepare($prepare_sql);