<?php
session_start();
//Recuperation des login et mot de passe
$login=$_POST["login"];
$password=md5($_POST["password"]);
 
//Connection à la base de données
mysql_connect("localhost","root","" );
mysql_select_db("bde" );
//Verification
$user="user_password";
$table="phpbb_users";
$query="SELECT * FROM phpbb_users WHERE username='$login' AND user_password='$password'";
$result = mysql_query($query) or die('error making query');
    $affected_rows = mysql_num_rows($result);
 
    //Si il y a un enregistrement, la connexion est valide sinon invalide.
    if($affected_rows == 1) {
        print 'validated';
  $check=1;
  ?>

Notice: Undefined index: login in d:\easyphp1-7\www\bde\login.php on line 4
 
Notice: Undefined index: password in d:\easyphp1-7\www\bde\login.php on line 5
not valid

if ( (isset($_POST['login']) && (isset($_POST['password']) ) {
    $login=$_POST["login"] ;
    $password=md5($_POST["password"]) ;
}