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Form Builder Error

Thread began 11/16/2009 11:59 am by iansr393906 | Last modified 12/02/2009 2:48 pm by Eric Mittman | 2323 views | 12 replies |

iansr393906

Form Builder Error

I keep on getting this error on any form I create, please help. Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /var/www/vhosts/mch-ok.com/httpdocs/Survery.php:1) in /var/www/vhosts/mch-ok.com/httpdocs/WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php on line 3

I looked through the code and can't seem to find the error. The code for that php is below:

<?php
if (!session_id()) {
session_start();
}
function ValidatedField($page,$field) {
$theFields= "";
$retVal = "";
if (isset($_SESSION["WAVT_".$page."_Errors"])) {
$theFields = "&".$_SESSION["WAVT_".$page."_Errors"];
}
if (strpos($theFields,"&WAVT_".$field."=") !== false) {
$retVal = substr($theFields,strpos($theFields,"&WAVT_".$field."=")+strlen("&WAVT_".$field."="));
}
if (strpos($retVal,"&WAVT_") !== false) {
$retVal = substr($retVal,0,strpos($retVal,"&WAVT_"));
}
if ($retVal == "" && $page == $field) {
$retVal = ValidatedField($page,$field."_Errors");
}
return $retVal;
}

?>

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iansr393906

More info

Here is the website in a test area, Survery.php

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Eric Mittman

If it is just a headers issue you should be able to resolve this by finding some white space around the php blocks and deleting it, also there is a BOM option you can have when you save pages in DW, if you have this option enabled for the page you should try disabling it when you save the page. Here is a link to an article that has more info on the white spaces:

81/

If this does not clear up the problem then the issue may be with the session starting and not be able to write the session cookies. If this is the case there may be an issue with your session save path info for you PHP. If you have access to this you should check the php.ini file for this setting and make sure it is set correctly. If you do not have access to this or do not know how to update it you should speak with your host about this.

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iansr393906

Originally Said By: Eric Mittman
  If it is just a headers issue you should be able to resolve this by finding some white space around the php blocks and deleting it, also there is a BOM option you can have when you save pages in DW, if you have this option enabled for the page you should try disabling it when you save the page. Here is a link to an article that has more info on the white spaces:

81/

If this does not clear up the problem then the issue may be with the session starting and not be able to write the session cookies. If this is the case there may be an issue with your session save path info for you PHP. If you have access to this you should check the php.ini file for this setting and make sure it is set correctly. If you do not have access to this or do not know how to update it you should speak with your host about this.  



Neither one of these solutions corrected the problem. Please Help

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Eric Mittman

The error you are getting could be a result of just some sort of output occurring, or a problem with the session. To rule out a problem with the session please use these two test pages that I created that will set a value and print it to the screen.

Please load these files and test them and let me know what the result is. If you get the same thing on both pages then the sessions should be working ok. If this is the case please post back with a copy of the survey page in question.

Attached Files
session_test2.zip
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iansr393906

Results

This was what I got as a result of the session test loading,
the value of the session variable test is: test var
array(1) { ["test"]=> string(8) "test var" }

What would you like to post from my website, the page thats throwing the errors is above.

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Eric Mittman

I will need to have a copy of the page in question. If you can please post back and include this in a zip archive so I can take a look at it and try to find the problem.

This error about the headers already being sent is one of the most common that you will encounter in a php page. It is almost always due to some sort of white space that occurs outside of the php blocks on the page, most of the time it is the first character in the file.

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iansr393906

I have attached the page in question. When I spoke to my website host about their possibly being aproblem with the php.ini file this was his response:
Ian,

Output buffering is not something we typically employ, and it is not in use
on the mch-ok.com site. As a result, sessions must be initiated in the
first line of code of the file requested by the server daemon.

It appears that whatever form technology you are trying to implement is
trying to initiate a session after that first line.

You have a few options in this scenario:

1) You could initiate the session at the top of Survey.php.
2) You could see if the form technology can operate without a session.
3) You could see if the form technology provides alternative instructions
for dealing with sessions.


I then went ahead and edited the WAVT_ValidatedForm_PHP.php file and eliminated the session startup and it works fine, but I'm assuming I need it to start a new session? Also could you provide more information on how I would have this form sent in an email, I purchased Universal Email, but I don't quite understand how I get it to work with this form.

Attached Files
Test.zip
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Eric Mittman

If the problem is where the session is starting then you could start the session at the top of your page with this line of code:

php:
<?php if(!session_id()) session_start(); ?>



This should initiate the session for you if this is how you need to have it for your hosting.

As for the Universal Email there is a Solution Recipe for this that is available on the Universal Email support page that can be found here:

universal-email/

In the Solution Recipes section you can check out the sending the form, it will cover the steps that you need to send the form info in an email. If you have trouble with this or have problems with any formatting in the message let us know and we will be glad to help you out.

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iansr393906

After doing what you suggested i still get the following error

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /var/www/vhosts/mch-ok.com/httpdocs/Survery.php:1) in /var/www/vhosts/mch-ok.com/httpdocs/WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php on line 1

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