Warning: Cannot add header information

Anon

OK, I'm the 1.045.487.784 user that got this kind of MySQL error message but, as I'm nearly not used at all with PHP, I'm fighting making run my site... 🙂
I've a PHP search engine page and if I try to run a search I get this error message:

"Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 21"

And if I redo the same search after 1-2 minutes (didn't look exactly...) I get this error instead:

"Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 15

Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 16"

The lines of lastvisit.inc.php involved in this error contain the SetCookie() function.
What have I to do to fix this problem? Would it be useful for you if I paste here the source of my lastvisit.inc.php (26 lines) file?

trippyd

Cookies are sent with the header information, so if you have sent any non-header information (any html, text, images, whatever) then the headers are complete and no more can be sent, so the setcookie is generating an error.

I would look for any code before that sends data to the browser (even 'whitespace' like carriage returns and spaces that are outside of a <?php?> tag). That is where the error is starting. Just move the setcookie to a place before you send the data.

Anon

Tnx that was the problem! Now it works like a charm. 😉

Rogee

Anon

Rogee Bauhaus wrote:

"Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 21"

And if I redo the same search after 1-2 minutes (didn't look exactly...) I get this error instead:

"Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 15

Warning: Cannot add header information - headers already sent by (output started at ../include/timestamp2utime.php:13) in ../include/lastvisit.inc.php on line 16"

The lines of lastvisit.inc.php involved in this error contain the SetCookie() function.
What have I to do to fix this problem? Would it be useful for you....

trippyd

What is on line 13 of your script?

It would help if you could post the first 20 or so lines of your script. Something on line 13 is writing to the browser.

wdean

I've encountered the same problem. It was strange,
because it worked fine on NT4 running apache. I'm
trying to move my LAMP stuff onto my Linux box, &
this is one of the strange behaviors I've noticed.

gtneill

Thank you for the simple explanation that code outside the <?php ?> markers is sent to the browser.

I was having this trouble after loading my code into a new editor which added an extra blank line at the end of file (outside my closing ?>). Removing these extra lines fixed my problem.

Thanks again.