Bug #76540 [Nab]: session_start() fails if headers already sent

Edit report at https://bugs.php.net/bug.php?id=76540&edit=1 ID: 76540 User updated by: tony at marston-home dot demon dot co dot uk Reported by: tony at marston-home dot demon dot co dot uk Summary: session_start() fails if headers already sent Status: Not a bug Type: Bug Package: Session related Operating System: Windows 10 PHP Version: 7.2.7 Block user comment: N Private report: N New Comment: You are correct. "session.use_cookies = 0" did the trick. Previous Comments: ------------------------------------------------------------------------ [2018-06-28 10:42:13] spam2 at rhsoft dot net yes it's a bug in your code and/or config "session.use_cookies = 1" don't make any sense within a CLI script as well as session_start() at all in most cases ------------------------------------------------------------------------ [2018-06-28 10:38:49] tony at marston-home dot demon dot co dot uk Excuse me, but this *IS* a bug. When running PHP in CLI mode the use of cookies is irrelevant. They are only relevant when running PHP through a browser. When the script starts in CLI mode the $_COOKIE array is empty, and any cookies that are created are lost when the script terminates as they cannot be passed on to another script. The check for headers/cookies already sent can therefore be safely skipped when running in CLI mode. ------------------------------------------------------------------------ [2018-06-28 10:33:26] spam2 at rhsoft dot net if(PHP_SAPI !== 'cli' && headers_sent() === false) { session_start(); } ------------------------------------------------------------------------ [2018-06-28 10:04:21] krakjoe@php.net Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php ------------------------------------------------------------------------ [2018-06-28 09:56:04] tony at marston-home dot demon dot co dot uk Description: ------------ When running a script in CLI mode I cannot open a new session if any headers have already been sent. According to bug #28923 the original message concerned the session cookie, but cookies are only used when running the script in a browser. If I am running in CLI mode there is no browser, so cookies should be irrelevant, which means that session_start() should not fail. Test script: --------------- <? flush(); session_start(); echo "here"; ?> Expected result: ---------------- Do not get warning. Actual result: -------------- session_start(): cannot start session when headers already sent ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76540&edit=1