D'abord, il manque un ';' en fin d'echo.
Essaye quelque chose du genre:
johan@johan:~/public_html$ cat myfile.php
<?php
session_start();
if(!isset($_SESSION['login'])) {
readfile("login.html");
}
else {
echo 'Bonjour $login';
}
?>
johan@johan:~/public_html$ cat login.html
<html>
<body>
<form method="post" action="login.php">
User Name<input type="text" name="username">
Password <input type="password" name="password">
<input type="submit" name="doit">
</form>
<body>
</html>
Johan
Gates gave you the windows.
GNU gave us the whole house.(Alexandrin)