tag:blogger.com,1999:blog-6825834695028442434.post8489794113206612040..comments2024-02-03T15:40:52.427+05:30Comments on Internet Marketing Insights: If-Modified-Since HTTP Header – How to Use with PHPAnonymoushttp://www.blogger.com/profile/10687914945079530576noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6825834695028442434.post-5186885633375254012011-09-09T00:40:29.496+05:302011-09-09T00:40:29.496+05:30Just a note that your Last-Modified header should ...Just a note that your Last-Modified header should carry an HTTP-Date (RFC-1123) in UTC otherwise the browser may mistake it for UTC and send back the wrong time in the IF_MODIFIED_SINCE header.<br /><br />header('Last-Modified: ' . gmdate(DATE_RFC1123, $lastModified ) );Anonymoushttps://www.blogger.com/profile/14635139183033438188noreply@blogger.com