Warning (2): session_start(): Cannot send session cache limiter - headers already sent (output started at /home/toannt1/public_html/lib/Cake/Cache/Engine/FileEngine.php:254) [ROOT/Config/bootstrap.php, line 3]

<?php
session_name('CAKEPHP');
session_start();

$boot = true
$engine = 'File'
$duration = '+10 seconds'
$prefix = 'myapp_'
$exception = array(
	'handler' => 'ErrorHandler::handleException'
)
$error = array(
	'handler' => 'ErrorHandler::handleError',
	'level' => (int) 24575
)

session_start - [internal], line ??
include - ROOT/Config/bootstrap.php, line 3
Configure::bootstrap() - CORE/Cake/Core/Configure.php, line 92
include - CORE/Cake/bootstrap.php, line 163
[main] - APP/webroot/index.php, line 82