<?php 

session_start();

if($_POST['nome']=='') {
  header("Location: page1.html");
  exit;
}

$_SESSION['nome'] = $_POST['nome'];
$_SESSION['email'] = $_POST['email'];
$_SESSION['obs'] = $_POST['obs'];
?>

<h1>Pagina 2</h1>

<p>
Ola <b><?=$_SESSION['nome']?></b>. Bemvindo a este site. 
Preencha mais estes campos.
</p>

<form method="post" action="page3.php">
<table border="0" cellpadding="0" cellspacing="5">
    <tr>
        <td align="right">Profissao</td>
        <td><input name="profissao" type="text" size="25" /></td>
    </tr>
    <tr>
        <td align="right">Morada</td>
        <td><input name="morada" type="text" size="25" /></td>
    </tr>
    <tr>
        <td align="right" colspan="2">
            <hr noshade="noshade" />
            <input type="reset" value="Reset Form" />
            <input type="submit" name="submitok" value="   OK   " />
        </td>
    </tr>
</table>
</form>

<p>
Session ID: <?=session_id()?>
</p>