session error

[tazgalsinh]

When a user logs into the next page from the login page. it displays the page ok but has this error message at the top of the page.

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at c:\inetpub\wwwroot\recordstorephpstart\admincatalog.php:2) in c:\inetpub\wwwroot\recordstorephpstart\admincatalog.php on line 3

[rIkLuNd]

Are you sure that there is no space or html code between the top of the page and <?php where session_start(); is??

[tazgalsinh]

yes sure, here is that part of the code

<?php require_once('Connections/RecordStorePHP.php'); ?> 
<?php
session_start();
$MM_authorizedUsers = "";
$MM_donotCheckaccess = "true";

[rIkLuNd]

And there is no html or space before the <?php in the file that you're including?

[kriek]

Output buffering with ob_start() and ob_end_flush().

Output buffering (PHP 4.0) was originally designed to solve HTTP header errors.

<?php ob_start(); 

// entire script, code, or page here

ob_end_flush(); ?>

Although ob_end_flush() isn't needed in MOST cases because it is called automatically at the end of script execution by PHP itself when output buffering is turned on either in the php.ini or by calling ob_start(). I should also mention that Output buffers are stackable, that is, you may call ob_start() while another ob_start() is active. Just make sure that you call ob_end_flush() the appropriate number of times. If multiple output callback functions are active, output is being filtered sequentially through each of them in nesting order.