2016-06-21 14 views

Antwort

1

Dieser Code sollte funktionieren.

<?php 
//Caching 

//get the last-modified-date of this very file 
$lastModified=filemtime(__FILE__); 
//get a unique hash of this file (etag) 
$etagFile = md5_file(__FILE__); 
//get the HTTP_IF_MODIFIED_SINCE header if set 
$ifModifiedSince=(isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? $_SERVER['HTTP_IF_MODIFIED_SINCE'] : false); 
//get the HTTP_IF_NONE_MATCH header if set (etag: unique file hash) 
$etagHeader=(isset($_SERVER['HTTP_IF_NONE_MATCH']) ? trim($_SERVER['HTTP_IF_NONE_MATCH']) : false); 

//set last-modified header 
header("Last-Modified: ".gmdate("D, d M Y H:i:s", $lastModified)." GMT"); 
//set etag-header 
header("Etag: $etagFile"); 
//make sure caching is turned on 
header('Cache-Control: public'); 

//check if page has changed. If not, send 304 and exit 
if (@strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])==$lastModified || $etagHeader == $etagFile) 
{ 
     header("HTTP/1.1 304 Not Modified"); 
     exit; 
} 

//your normal code 
//echo "This page was last modified: ".date("d.m.Y H:i:s",time()); 

//END OF Caching 
?>