What is this error meaning?! [Cannot send session cookie]

[toniwong]

Warning: Cannot send session cookie - headers already sent by (output started at /home/hkishop/catalog/index.php:11) in /home/hkishop/catalog/includes/functions/sessions.php on line 67

Warning: Cannot send session cache limiter - headers already sent (output started at /home/hkishop/catalog/index.php:11) in /home/hkishop/catalog/includes/functions/sessions.php on line 67

[Christie]

Somebody addressed the "headers already sent by..." error in another thread. It seems to occur because PHP parser encounters a space or extra line after the files last closing of the php code. That puts the parser into an output mode which produces the "header already sent by..." error.

The simplest answer is that you probably have a renegade space or extra line after the last "?>" in the php file. Download and open your file in Notepad (or any pure text editor program) and check for spaces after the last ?>

The right tool for editing php is a Text Editor application...even the website FIle Manager and HTML editors tend to add hidden things.

Some recommended Text Editor applications are:

• textpad from www.textpad.com ($29; Windows)
  ultraedit from www.ultraedit.com ($30;Windows)[
  MetaPad from www.liquidninja.com/metapad/ (free; Windows)
  NotePad Lite from http://www.notetab.com (free ;Windows[
  BBedit from www.barebones.com (Mac)
  gedit (linux)

As neil said in another thread...

The problem is at the end or beginning of your php file there are not allowed to be any blank spaces or lines.
Download one of the above or use Notepad (not rec by me)
Open the file - Go to the end and see if there is any blank characters after the ?>