PHP: Headers

headers.php

/* Time-Scales */
$aTimeScale = array(
	'year' => 31536000,
	'month' => 2628000,
	'week' => 604800,
	'day' => 86400,
	'hour' => 3600,
	'minute' => 60
	);
/* Expires */
$sExpire = 'Expires: '.gmdate("D, d M Y H:i:s", time() + $aTimeScale['hour']).' GMT';
/* Cache */
header($sExpire);
/* No-Cache */
//header('Cache-Control: no-cache, must-revalidate');
/* JSON */
header('Content-Type: application/json; charset: UTF-8');
/* XML */
//header('Content-Type: text/xml; charset: UTF-8');