สอบถามเรื่อง Cannot send session cache limiter - headers already sent (output started at ครับ

<?php
include'core/init.php';
include'includes/overall/header.php';
?>
		
		<div class="grid_11 alpha">
			<h1 class="p_1">NEWS</h1>
			<hr>
			<section>
			
			</section>
		</div>
	    <?php include"includes/aside.php"; ?>
<?php include'includes/overall/footer.php'; ?>

<?php
session_start();
error_reporting(0);

require'database/connect.php';
require'functions/general.php';
require'functions/users.php';

$errors = array();
?>