note 124597 added to function.virtual

Starting with 7.2 various session related things were changed and it seems part of it is conflicting with virtual(). Calling it you may receive a "PHP Warning: virtual(): Headers already sent. You cannot change the session module's ini settings at this time in ..." although no header was set and virtual() should simply provide static content from a file. It took half a day to find out that some main session.configuration.php settings (e.g. save_handler, serialize_handler, or save_path) in the Apache config (all levels) are causing this. It seems the settings are regarded as likely to change headers but virtual() is already beyond sending them. Unfortunately the warning is then not only logged to error_log but also part of the content virtual() sends to the client which screws it up - the format of the content like binary image data is no more correct. If you do not need php's session management you can remove all session.* settings in your apache configuration to avoid the warning. Otherwise a workaround is to switch off E_WARNING before calling virtual(). <?php $filename = '/data/image.jpg'; $level = error_reporting(); error_reporting($level & ~E_WARNING); virtual($filename); error_reporting($level); ?> ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.167.36 (proxied: 185.35.208.129) ---- Manual Page -- http://php.net/manual/en/function.virtual.php Edit -- https://master.php.net/note/edit/124597 Del: integrated -- https://master.php.net/note/delete/124597/integrated Del: useless -- https://master.php.net/note/delete/124597/useless Del: bad code -- https://master.php.net/note/delete/124597/bad+code Del: spam -- https://master.php.net/note/delete/124597/spam Del: non-english -- https://master.php.net/note/delete/124597/non-english Del: in docs -- https://master.php.net/note/delete/124597/in+docs Del: other reasons-- https://master.php.net/note/delete/124597 Reject -- https://master.php.net/note/reject/124597 Search -- https://master.php.net/manage/user-notes.php