class BetterPDO extends PDO
{
    private $realPDO  = NULL;
    private $dsn      = "";
    private $username = "";
    private $password = "";
    private $options  = [];

    public function __construct ($dsn, $username = "", $password = "", $options = [])
    {
        $this -> dsn = $dsn;
        $this -> username = $username;
        $this -> password = $password;
        $this -> options = $options;
    }

    private function getRealPDO ()
    {
        if (is_null ($this -> realPDO))
        {
            $this -> realPDO = new PDO ($this -> dsn, $this -> username, $this -> password, $this -> options);
        }
        return $this -> realPDO;
    }

    // We're only implementing exec for brevity but you have to do this for all public methods of PDO
    public function exec ($sql)
    {
        $retries = 0;
        while (true)
        {
            try
            {
                return $this -> getRealPDO () -> exec ($sql);
            }
            catch (PDOException $ex)
            {
                $this -> realPDO = NULL;
                if (++$retries > 5)
                {
                    // We've passed our retry limit
                    throw $ex;
                }
            }
        }
    }
}

/* Your Database Name */
    $dbname = 'mydatabase';

    /* Your Database User Name and Passowrd */
    $username = 'root';
    $password = 'password';

    try {
      /* Establish the database connection */
      $conn = new PDO("mysql:host=localhost;dbname=$dbname", $username, $password);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
   /*  your code goes here*/
 } catch(PDOException $e) {
        echo 'ERROR: ' . $e->getMessage();
    }
    //mysql_close($conn);

     $conn=null;