Bug #65391 [Opn]: Unable to send vary header user-agent when ob_start('ob_gzhandler') is called

Edit report at https://bugs.php.net/bug.php?id=65391&edit=1 ID: 65391 Updated by: yohgaki@php.net Reported by: nikcomestotalk at gmail dot com Summary: Unable to send vary header user-agent when ob_start('ob_gzhandler') is called Status: Open Type: Bug -Package: Zlib related +Package: Output Control Operating System: any PHP Version: 5.4.17 Block user comment: N Private report: N New Comment: Reclassified as output control issue, since this is output issue. Previous Comments: ------------------------------------------------------------------------ [2013-08-06 04:50:39] yohgaki@php.net zlib module is the one writing Vary header. ------------------------------------------------------------------------ [2013-08-05 09:22:52] nikcomestotalk at gmail dot com Description: ------------ ob_start('ob_gzhandler') is overwriting vary-header "Vary: User- Agent,Accept,Accept-Encoding" to "Vary: Accept-Encoding" Not using apache level gzip Test script: --------------- header("Vary: User-Agent,Accept,Accept-Encoding"); ob_start("ob_gzhandler"); ob_flush(); Client side response header vary: Accept Encoding Expected result: ---------------- Vary: User-Agent,Accept,Accept-Encoding Actual result: -------------- vary: Accept Encoding ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65391&edit=1