PDO Connectivity Step 1

1. DB Config File

<?php
    Class Connection {
        private  $server = "mysql:host=localhost;dbname=pdo";
        private  $user = "root";
        private  $pass = "";
        private $options  = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,);
        protected $con;
     
        public function openConnection()
            {
            try
                {
              $this->con = new PDO($this->server, $this->user,$this->pass,$this->options);
              return $this->con;
                }
            catch (PDOException $e)
                {
                    echo "There is some problem in connection: " . $e->getMessage();
                }
            }
        public function closeConnection() {
         $this->con = null;
           }
    }
?>