PHP session_start() problem

Anon

I have a page that reads...
...
<?php

session_start();
echo session_id();

?>
...
but each time I run it, along with printing the session id, I get two errors...

Warning: Cannot send session cookie - headers already sent by (output started at /home/sites/site92/users/oatmealboy81/web/zap/proton.php4:6) in /home/sites/site92/users/oatmealboy81/web/zap/proton.php4 on line 8

Warning: Cannot send session cache limiter - headers already sent (output started at /home/sites/site92/users/oatmealboy81/web/zap/proton.php4:6) in /home/sites/site92/users/oatmealboy81/web/zap/proton.php4 on line 8

So what should I do, what is going on? Thanks in advance.

laurabrandt

Tr y this

<?php
session_start();
echo session_id();
?>

Delete the extra blank line before the session_start ()

The reason why you have to delete the blank line is stated at the following URL http://www.php.net/manual/function.setcookie.php. According to that page, "Cookies must be sent before any other headers are sent (this is a restriction of cookies, not PHP). This requires you to place calls to this function before any or <head> tags."

More explanation can also be found at http://www.php.net/manual/en/function.header.php.

Quote "header() function must be called before any actual output is sent, either by normal HTML tags blank lines in a file, or from PHP"

Hope this helps.

Laura Brandt

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Anon

Hi.

There are two possible solutions.

First up, you have some HTML code (probably an empty line ?!?) before your PHP tags in your file. Normally, with basic setup, this makes impossible to send any kind of HTTP header informations to the client. Cookies are also 'transmitted' via the HTTP header.

On the other hand there's a possible solution for your question, and the opening texts, too. There is a setting in PHP.INI, called OUTPUT_BUFFERING. This is, in its basic state, turned OFF. Turning this swith ON means you are able to send header info (e.g. cookies, vars, etc.) after you have written some output to the channel. Note that this means some (minor) loss of performance also.

Best

OverLord @ FruttaElettronica.CoM

Anon

I got it working, thank you very much for your help.