Emails not sending with ecart and UE 4

Hi, i do not know how to fix this issue with the UE 4. I have set up ecart and all works well except the emails are not being sent. I get the following error codes on the confirm page when the page is submitted with the UE 4 attached.
Notice: Use of undefined constant undefined - assumed 'undefined' in /xxx/mysite.com/httpdocs/auth_confirm.php on line 522
line 522 is $BurstSize = undefined;

Notice: Use of undefined constant undefined - assumed 'undefined' in /xxx/mysite.com/httpdocs/auth_confirm.php on line 523
Line 523 is $BurstTime = undefined;

Notice: Use of undefined constant undefined - assumed 'undefined' in /xxx/mysite.com/httpdocs/auth_confirm.php on line 524
Line 524 is $WaitTime = undefined;

Warning: Division by zero in /xxx/mysite.com/httpdocs/auth_confirm.php on line 538
Line 538 is $TotalBursts = floor($TotalEmails/$BurstSize);

Warning: Division by zero in /xxx/mysite.com/httpdocs/auth_confirm.php on line 558
Line 558 is $BurstsRemaining = ceil(($EmailsRemaining-$AfterBursts)/$BurstSize);

Fatal error: Call to undefined function: session_commit() in /xxx/mysite.com/httpdocs/auth_confirm.php on line 567

Line 567 is session_commit();

Any help would be appreciated

Currently in the UE code that is on these lines you have this:

$BurstSize = undefined; 

$BurstTime = undefined; 

$WaitTime = undefined;

You should update these lines so that they are like this instead:

$BurstSize = 200; 

$BurstTime = 1; 

$WaitTime = 1;

This should stop the error that you are getting when you get to this page. I have logged this issue as a bug so that it can be fixed in a future update.

Thanks Eric,
I have corrected the error and now I seem to have one more problem. I now get the following error code on the confirm page when submitted.
Fatal error: Call to undefined function: session_commit() in /xxx/httpdocs/auth_confirm.php on line 567

Are you working with a version of php that is earlier than 4.4? If so this could be the reason you are having this problem since this function call did not exist until after 4.4.

To fix the problem you should replace the session_commit call that is on that line with this function:

session_write_close()

According to the php documentation this should do the same thing and is supported in versions 4.0.4 and up.

Thanks Eric,
When I applied session_write_close() that did it but there were two more instances of session_commit () that I also changed to session_write_close() on the confirm page and then one in the mail_php.php page.
I hope that is ok, as all emails appear to have gone through.
One more question though - Will upgrading my php to the latest version negatively impact any of my past pages when editing them is necessary?

It should not affect the pages unless they contain php code that has been deprecated or removed in a newer version. PHP 5 has been around since July of 04, so unless you have pages written before then it is likely that they will work just fine in a newer version.

This is rarely an issue though, all of the WebAssist generated code should work in the latest versions of php without an issue.