note 108138 added to function.header

Do not use example provided by "phpnet at holodyn dot com @ 31-Jan-2011 01:01" He used: <?php header("Pragma: public"); ?> and <?php header("Cache-Control: private",false); ?> which are the opposite. He used <?php header("Expires: 0"); ?> without knowing how it works. http://download.oracle.com/docs/cd/E13158_01/alui/wci/docs103/devguide/tsk_pagelets_settingcaching_httpexpires.html ">>>Note: Never use Expires = 0 to prevent caching.<<< The Expires header is sent by the remote server and passed through to the browser by the Portal Server. Unless the time on all three machines is synchronized, an Expires=0 header can mistakenly return cached content. To solve this problem, set the Expires header to a fixed date that is definitely in the past." He used <?php header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); ?> without knowing what he is doing. If post-check=0 and pre-check=0 equal to zero then it is the same as both of them are absent reference: http://blogs.msdn.com/b/ieinternals/archive/2009/07/20/using-post_2d00_check-and-pre_2d00_check-cache-directives.aspx ---- Server IP: 69.147.83.197 Probable Submitter: 68.41.254.20 ---- Manual Page -- http://www.php.net/manual/en/function.header.php Edit -- https://master.php.net/note/edit/108138 Del: integrated -- https://master.php.net/note/delete/108138/integrated Del: useless -- https://master.php.net/note/delete/108138/useless Del: bad code -- https://master.php.net/note/delete/108138/bad+code Del: spam -- https://master.php.net/note/delete/108138/spam Del: non-english -- https://master.php.net/note/delete/108138/non-english Del: in docs -- https://master.php.net/note/delete/108138/in+docs Del: other reasons-- https://master.php.net/note/delete/108138 Reject -- https://master.php.net/note/reject/108138 Search -- https://master.php.net/manage/user-notes.php