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PayPal IPN losing session on return?

php paypal ipn session

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#1 game_over


    Just below average Joe

  • Tech Issues Solved: 1
  • Joined: 07-May 04
  • Location: England

Posted 28 November 2012 - 12:07

I'm using Micha's PayPal IPN script and for the most part it worked great:https://github.com/Q.../PHP-PayPal-IPN
When i click Pay now on the website it redirects to paypal with correct information, allows payment to be made, but on return nothing happens, ie it does not upgrade the user as it should. Now i've tested the script my code outside of the IPN and it works perfect so it looks to me like the IPN script is losing the session?
Here is my button code:
<form name="_xclick" action="https://www.paypal.com/cgi-bin/webscr" method="post">
    <input type="hidden" name="cmd" value="_xclick">
    <input type="hidden" name="business" value="EMAIL_TO">
    <input type="hidden" name="currency_code" value="GBP">
    <input type="hidden" name="item_name" value="Text Light">
    <input type="hidden" name="amount" value="0.01">
    <input type="hidden" name="return" value="http://domain.co.uk/editors">
    <input type="hidden" name="notify_url" value="http://domain.co.uk/account/upgrade">
    <input type="submit" value="Pay now" class="btn btn-preview" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
So the notify url (IPN code) is /account/upgrade -- as far as i know this is where it should perform the upgrade task? so here is my (stripped down) code
if ($verified) {

    $errmsg = '';

    // some error checking

    if (!empty($errmsg)) {

        // manually investigate errors from the fraud checking

    } else {

        // upgrade user
        $package = serialize($_SESSION['package']);
        $this->db->update('users',array('id' => $_SESSION['user']['id']),array('payment_plan' => $package));


} else {

    // not verified, investigate problems
As above, the code under '// upgrade user' works fine outside, but on return from paypal it's obviously not keeping hold of the session. It's not throwing any errors, it's just not doing anything.
Where have i gone wrong? how can i ensure that session information will be passed back from PayPal.