<?php
      include('koneksi.php');
                    if($_POST) {

                        $username=mysql_escape_string($_POST['username']);
                        $password=mysql_escape_string($_POST['password']);
                        $sql="SELECT * FROM pedagang WHERE username='".$username."' AND  password='".$password."'";
                        $query=mysql_query($sql);
                        $data=mysql_fetch_array($query);
                        $cari=mysql_num_rows($query);
                        if($cari > 0) {
                            session_start();
                            $_SESSION['username'] = $username;
                            $_SESSION['password'] = $password;
                            // coba cek dulu ini udah bener apa ngga
                            if(!isset($data['id_pedagang']) {
                               var_dump($data)
                               die('id pedagang gak ada');
                            }
                            $_SESSION['id_pedagang'] = $data['id_pedagang'];
                            $_SESSION['nama'] = $data['nama'];

                            echo "<script>window.location=\"index_pedagang.php\"</script>";
                        } else {
                            print "<script>alert('selamat datang !') ;
                            javascript:history.go(-1);</script>";
                            echo "<div class='alert alert-warning'>
                                        <strong>Login Gagal!</strong> Username atau Password salah.
                                  </div>";



                        }
                    }
                        ?>