gistfile1.php

<?php 

class BdController
{
        private $_instance = null ;
 
        public function __construct()
        {
                $this->_instance = new PDO('mysql:host=127.0.0.1; dbname=pa_tp1','root', '');
        }
 
        public function getInstance()
        {
                return $this->_instance;
        }
}
 
class BdController
{
        private statuc $_instance = null ;
 
        private function __construct()
        {
            $this->_instance = new PDO('mysql:host=127.0.0.1; dbname=pa_tp1','root', '');
        }
 
        public static function getInstance()
        {
            if(is_null(self::$_instance))
            {
                self::_$instance = new self();
            }
            
            return self::$_instance;
       }
}