docu_system/files/system/HEADER.php.txt

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<?php
namespace SYSTEM;
class HEADER {
private static function checkHeader(){
$file = null;
$line = null;
if(headers_sent($file, $line)){
new \SYSTEM\LOG\WARNING('Header already sent @ '.$file.' line '.$line);
return false;}
return true;
}
public static function JSON(){
if(self::checkHeader()){
header('Access-Control-Allow-Origin: *');//allow cross domain calls
header('content-type: application/json');}}
public static function PNG(){
if(self::checkHeader()){
header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60))); // 1 hour
header('content-type:image/png;');}}
public static function JPG(){
if(self::checkHeader()){
header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60))); // 1 hour
header('content-type:image/jpeg;');}}
public static function JPEG(){
if(self::checkHeader()){
header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60))); // 1 hour
header('content-type:image/jpeg;');}}
public static function GIF(){
if(self::checkHeader()){
header('Expires: '.gmdate('D, d M Y H:i:s \G\M\T', time() + (60 * 60))); // 1 hour
header('content-type:image/gif;');}}
public static function JS(){
if(self::checkHeader()){
header('content-type:application/javascript;');}}
public static function CSS(){
if(self::checkHeader()){
header('content-type:text/css;');}}
public static function LESS(){
if(self::checkHeader()){
header('content-type:text/css;');}}
public static function FILE($filename){
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"".$filename."\"");}
public static function available($datatype){
$datatype = strtoupper($datatype);
return \method_exists('\SYSTEM\HEADER', $datatype);}
}