This question already has an answer here:
This was working just fine with Xammp on my local computer but started throwing this error when i uploaded it...
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/../admin/header.php:39) in /home/../admin/session.php on line 3
here is a section of the code
<?php include('header.php'); ?>
<?php include('session.php'); ?>
<body>
<?php include('navbar.php') ?>
<div class="container-fluid">
<div class="row-fluid">
<?php include('dashboard_slidebar.php'); ?>
<div class="span9" id="content">
<div class="row-fluid">
<?php $query= mysqli_query($GLOBALS["___mysqli_ston"], "select * from tbl1 where id = '$session_id'")or die(mysqli_error($GLOBALS["___mysqli_ston"]));
$row = mysqli_fetch_array($query);
?>
Any help will be greatly appreciated
</div>
Remove useless open/close tags
<?php
include('header.php');
include('session.php');
?>
because the part after ?> and before the next <?php has/can have a line-break or tabs that generates output.
And better move include('session.php'); above the other include as @Dimi sayed.