PHP & CSS Must Validate Function Example
The below code written in PHP embedded with CSS is to set the Header revalidation time for web page contents. Set Expire Header is the cache control which which will let your web page faster download on web browsers. Such header validation tell the browser at which frequency the the specified web page should be cached
Set Expire Header for Cache Control Validation
<?php
ob_start ("ob_gzhandler");
header("Content-type: text/css; charset: UTF-8");
header("Cache-Control: must-revalidate");
$offset = 60 * 60 ;
$ExpStr = "Expires: " .
gmdate("D, d M Y H:i:s",
time() + $offset) . " GMT";
header($ExpStr);
?>
