<?php
                    $login = $_SESSION['login'];
                    require_once "bd/bd.php";
                    $polaczenie = @new mysqli($host, $user, $pass, $user);
                        if($polaczenie->connect_errno!=0)
                            {
                                echo "Error: ".$polaczenie->connect_errno;
                            }
                        else
                            {
                                $zap = "SELECT SUM(`dystans`) as suma FROM `wpisy` WHERE `login`='$login'";
                                if($rezultat=$polaczenie->query($zap)
                                {
                                    $rrr = $rezultat->num_rows;
                                    if($rrr=1)
                                    {
                                        $row = $rezultat->fetch_assoc;
                                        $_SESSION['suma'] = $row['suma'];
                                    }
                                }
                            }
                ?>