Bug #68772 [NEW]: calling flush() after fastcgi_finish_request() exits PHP without errors or warn

From: rikurr at gmail dot com Operating system: Linux PHP version: 5.4.36 Package: Output Control Bug Type: Bug Bug description:calling flush() after fastcgi_finish_request() exits PHP without errors or warn Description: ------------ At least explicit flushing after calling fastcgi_finish_request() will exit PHP without any errors or warnings. I found this behavior while writing a code that: 1) calls fastcgi_finish_request() and based on parameters either 1.a) continues processing in the background (asynchronous) 1.b) streams the processsing logs to the screen (synchronous) 2) has a generic logging method that both echoes+flushes(streaming) and writes the logs to a file. As a workaround I will have have to check the parameter condition during logging to not to flush if fastcgi_finish_request() was called. Related: http://stackoverflow.com/questions/14191947/php-fpm-fastcgi-finish-request-reliable/27847878#27847878 Test script: --------------- <?php function writestamp($case, $file){ file_put_contents($file, "". $case . ": " . time() . "" . PHP_EOL, FILE_APPEND); } $file = tempnam(sys_get_temp_dir(), 'flushbug_'); echo 'Writing 4 timestamps to: '.$file; // this one gets called writestamp('1', $file); // and this register_shutdown_function('writestamp', '4', $file); // finish the request fastcgi_finish_request(); // as does this writestamp('2', $file); // but this one does NOT - calling flush() after fastcgi_finish_request() exits PHP without errors or warnings flush(); writestamp('3', $file); Expected result: ---------------- PHP should continue processing the script if I flush() output to the client after calling fastcgi_finish_request() and output 4 lines to the temporary file: 1: 1420766961 2: 1420766961 3: 1420766961 4: 1420766961 Actual result: -------------- PHP exits the process without, at least to my knowledge, errors or warnings and only outputs 3 lines to the temporary file: root@afa63474201a:/# cat /tmp/flushbug_XCsRsu 1: 1420766961 2: 1420766961 4: 1420766961 -- Edit bug report at https://bugs.php.net/bug.php?id=68772&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68772&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68772&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68772&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68772&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68772&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68772&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68772&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68772&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68772&r=support Expected behavior: https://bugs.php.net/fix.php?id=68772&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68772&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68772&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68772&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68772&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68772&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68772&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68772&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68772&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68772&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68772&r=mysqlcfg