$_SESSION lost?

Is the session value being lost in the following:

parent:
<?php
if(!empty($_SESSION['name'])) echo ($_SESSION['name']);
?>

<html>
<form>
<iframe src="child.php"/>
</iframe>

</form>

</html>

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child:
<?php
 if(!empty($_FILES)) {$_SESSION['name'] =$_FILES['file']['name']  ;
   }
?>
<html>
<body>

<form action="child.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<input type="submit" name="submit" value="Submit" />
</form>

</body>
</html>

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Can the $_SESSION value be retrieved by the parent?
pillmillAsked:
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Dave BaldwinFixer of ProblemsCommented:
Without session_start() at the top of each and every page, you effectively do not have session variables because session_start() sets up and refetches the session id which is used to identify the variables for your session.  Without session_start(), you do not have a proper session id.

If both files are on the same server and sessions are setup properly, then parent and child are in the same session because they are in the same browser at the same time and can see the same session variables.

http://us.php.net/manual/en/function.session-start.php
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pillmillAuthor Commented:
Thanks. I added session_start() to the parent:
<?php
session_start(); 
if(!empty($_SESSION['name'])) ($_SESSION['name']);
?>
<html>
<form>
<iframe src="child.php" />
</iframe>
</form>
</html>

Open in new window


Session variables still seem to be unavailable.
How can I access $_SESSION set by the child?
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Dave BaldwinFixer of ProblemsCommented:
You have to add it to ALL pages, not just the parent.  It has to be identified on each page that is loaded.  That includes the child page.  

The PHP page on the server only 'sees' the session during the time it is processing the PHP code.  When it gets to the browser, the server is already done with the session for that page.  It's not a 'sticky' kind of thing.
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