Sessions

dmcglone

Hey all,

I'm still learning and I'm working on a site where I am using a template system, and I am trying to add a login system but when I try to add the login system into my template system I get an error that the session has already been started.

I don't remember or see any sessions that I've started, so I cannot for the life of me figure out why I'm getting a session error.

The whole purpose of this project was to learn and understand how writing templates work. I've even tried organizing things and such to try and make things a little easier and help me understand a little more.

Can anyone give me some pointers here? I'd appreciate it.

Almost forgot the URL

http://www.dmcentral.net/test

I removed the sql username and password from the code in functions/sql.php and admin/include/constants.php

Blessings
David M.

NogDog

Does the error message say anything about where the session was already started? If not, you could search the script, any files it includes/requires (and any files they include/require, and so forth) looking for the session_start() call. Other than that, it's difficult to say anything more without more details.

dmcglone

NogDog;10939304 wrote:
Does the error message say anything about where the session was already started? If not, you could search the script, any files it includes/requires (and any files they include/require, and so forth) looking for the session_start() call. Other than that, it's difficult to say anything more without more details.

Sorry I forgot the URL in the original post, but this is the error I get:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/david/www/doug/current/index.php:1) in /home/david/www/doug/current/admin/include/session.php on line 43

I've looked and looked for any sessions in the code but I can't find anything. The login code in the admin is not my code, I found it on the internet so I can study it and learn.

Blessings

NogDog

Ahh...that's not the same thing as session already started.

When you do a session_start(), it creates a cookie to be sent with the other HTTP headers. As all headers must be sent before any actual content, once you output anything to the browser, you can no longer do a session_start(). "Anything" can be an echo statement, HTML not within <?php . . . ?> tags, or even a newline before the opening <?php tag. So, look at line 1 of the index.php file and see if it's outputting something that you can defer until after the session_start(), or clean up any extraneous white-space before the opening <?php tag.

Oh, one other "gotcha" is if you save your file as UTF-8 with a BOM (byte order mark) character. You'll either need to save it as plain ASCII text or as UTF-8 without a BOM (most good text editors should at least have an option for that when saving as UTF-8).

dmcglone

NogDog;10939308 wrote:
Ahh...that's not the same thing as session already started.

When you do a session_start(), it creates a cookie to be sent with the other HTTP headers. As all headers must be sent before any actual content, once you output anything to the browser, you can no longer do a session_start(). "Anything" can be an echo statement, HTML not within <?php . . . ?> tags, or even a newline before the opening <?php tag. So, look at line 1 of the index.php file and see if it's outputting something that you can defer until after the session_start(), or clean up any extraneous white-space before the opening <?php tag.

Oh, one other "gotcha" is if you save your file as UTF-8 with a BOM (byte order mark) character. You'll either need to save it as plain ASCII text or as UTF-8 without a BOM (most good text editors should at least have an option for that when saving as UTF-8).

Thank you. I went over sessions not too long ago and I was told this a million times.