How to prevent Browser cache for php site
I have a php site running in cloud server.When ever i add new files css, js or images the browser is loading the same old js, css and image files stored in cache.
My site has a doctype and meta tag as below
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Page-Enter" content="blendTrans(Duration=1.0)">
<meta http-equiv="Page-Exit" content="blendTrans(Duration=1.0)">
<meta http-equiv="Site-Enter" content="blendTrans(Duration=1.0)">
<meta http-equiv="Site-Exit" content="blendTrans(Duration=1.0)">
Because of the above doctype and meta code am i loading the same files cached in browser instead of new one
Solution 1:
try this
<?php
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
?>
Solution 2:
Here, if you want to control it through HTML: do like below Option 1:
<meta http-equiv="expires" content="Sun, 01 Jan 2014 00:00:00 GMT"/>
<meta http-equiv="pragma" content="no-cache" />
And if you want to control it through PHP: do it like below Option 2:
header('Expires: Sun, 01 Jan 2014 00:00:00 GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');
AND Option 2 IS ALWAYS BETTER in order to avoid proxy based caching issue.
Solution 3:
You can try this:
header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
header("Connection: close");
Hopefully it will help prevent Cache, if any!