Solved

Headers already sent issue, Can i just remove the goto lines of code?

Posted on 2013-01-18
6
167 Views
Last Modified: 2013-01-21
I have a form that is deleting a user.  It works fine, but gives me the "Headers already sent" error on the page.  I'd like to not have that show up and get this to work correctly.

I have attached the snippet that I am using after the "DELETE" from DB code.

Open in new window

if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "infoID")) {
if ((isset($_GET['userID'])) && ($_GET['userID'] != "")) {
  $deleteSQL = sprintf("DELETE FROM tblusers WHERE userID=%s",
                       GetSQLValueString($_GET['userID'], "int"));

  mysql_select_db($database_con_db_local, $con_db_local);
  $Result1 = mysql_query($deleteSQL, $con_db_local) or die(mysql_error());

  $deleteGoTo = "users.php";
  if (isset($_SERVER['QUERY_STRING'])) {
    $deleteGoTo .= (strpos($deleteGoTo, '?')) ? "&" : "?";
    $deleteGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $deleteGoTo));
}
}

Open in new window

0
Comment
Question by:axessJosh
6 Comments
 
LVL 53

Expert Comment

by:COBOLdinosaur
ID: 38793584
There must be absolutely nothing sent to the browser before the header function, even a blank line before the <?php tag will cause the error you cannot echo or do anything else that sends something to the browser before the header.

Cd&
0
 
LVL 2

Author Comment

by:axessJosh
ID: 38793593
the file that is being used to process the deletion is inserted using:

<?php include_once (); ?>

since the file its included in is also PHP, could there be a conflict of some kind there?
0
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 400 total points
ID: 38793670
Yes, there could be a conflict there.  There is probably a newline character of invisible whitespace.  You can add ob_start() as the first PHP statement in the first script and it will probably solve the problem.  It may make your scripts run faster, too!
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 38795941
Extra php brackets cause white space to be added in between them.  The newlines that Ray mentioned are in between the ?> at the end of the first line and <?php on the second line.

<?php include_once (); ?>
<?php include_once (); ?>

Open in new window

0
 
LVL 11

Expert Comment

by:mcnute
ID: 38796232
ob_start();

Open in new window

is your friend as Ray pointed out.
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 38802414
Thanks for the points and thanks for using EE, ~Ray
0

Featured Post

VMware Disaster Recovery and Data Protection

In this expert guide, you’ll learn about the components of a Modern Data Center. You will use cases for the value-added capabilities of Veeam®, including combining backup and replication for VMware disaster recovery and using replication for data center migration.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
These days socially coordinated efforts have turned into a critical requirement for enterprises.
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question