Using properly PDO class

<?php
namespace Project\DB;
class PDOBase extends \PDO {
  //custom properties
  protected $connection_property_1;
  protected $status;
  protected $partition;
  public function __construct()
  {
    //to the PDO class
    //Read PHP cocumentation
    parent::construct();
  }
  
  public function __clone()
  {
    return null;
  }
  
  public function custom_1()
  {
    // custom methods
  }
  
  public function status() {}
  
}