From: sec dot wb at heysoft dot de Operating system: all PHP version: 5.2.11 PHP Bug Type: Session related Bug description: stupid cache parameters
Description: ------------ function session_start causes php to send the following line: Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 This is quite stupid because no browser does care about "post-check=0, pre-check=0". IE will ignore it, as you can read here: http://blogs.msdn.com/ieinternals/archive/2009/07/20/Using-post_2D00_check-and-pre_2D00_check-cache-directives.aspx It says: "http://blogs.msdn.com/ieinternals/archive/2009/07/20/Using-post_2D00_check-and-pre_2D00_check-cache-directives.aspx"; And apparently there even was a beta version of IE7 which did download all objects twice when "post-check=0, pre-check=0" was specified. So, I wonder why it is there in nearly each php page? Reproduce code: --------------- <?php // Start a session if(!defined('SESSION_STARTED')) { session_name('a_session_id'); @session_start(); define('SESSION_STARTED', true); } ?> Expected result: ---------------- No stupid cache control output Actual result: -------------- Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 -- Edit bug report at http://bugs.php.net/?id=49725&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=49725&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=49725&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=49725&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=49725&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=49725&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=49725&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=49725&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=49725&r=needscript Try newer version: http://bugs.php.net/fix.php?id=49725&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=49725&r=support Expected behavior: http://bugs.php.net/fix.php?id=49725&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=49725&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=49725&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=49725&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49725&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=49725&r=dst IIS Stability: http://bugs.php.net/fix.php?id=49725&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=49725&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=49725&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=49725&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=49725&r=mysqlcfg
