#19668 [Opn->Csd]: Crash when using callback with ob_start()

ID: 19668 Updated by: yohgaki@php.net Reported By: phpbugs@realplain.com -Status: Open +Status: Closed Bug Type: Output Control Operating System: Win2000 PHP Version: 4.2.3 New Comment: This bug has been fixed in CVS. In case this was a PHP problem, snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. In case this was a documentation problem, the fix will show up soon at http://www.php.net/manual/. In case this was a PHP.net website problem, the change will show up on the PHP.net site and on the mirror sites in short time. Thank you for the report, and for helping us make PHP better. This should be fixed in CVS. Previous Comments: ------------------------------------------------------------------------ [2002-10-01 02:50:36] phpbugs@realplain.com I have read that page but it doesn't apply to Windows, right? So is there anything I can do on Windows (I guess the "Dr. Watson" log file is useless)? Sorry. :-) ------------------------------------------------------------------------ [2002-10-01 02:25:57] sniper@php.net Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. ------------------------------------------------------------------------ [2002-10-01 01:58:14] phpbugs@realplain.com Yes, that seems to have fixed it. However, on any larger, more complicated scripts (e.g. not the example I posted), including where I discovered the crash, Apache crashes if you refresh the page quickly. But I guess that's another issue in the dev build... ------------------------------------------------------------------------ [2002-09-30 09:43:54] sander@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-latest.zip ------------------------------------------------------------------------ [2002-09-30 03:09:03] phpbugs@realplain.com System: Win2000 SP3 (dual CPU if it matters), Apache 1.3.26 (default setup), and PHP 4.2.3 as a module (default setup) Problem: When I use ob_start('callback') and "callback" takes $var as its parameter, Apache crashes if you modify $var and reassign it to $var. Code: <?php ob_start('test'); echo 'This is a test!'; function test($output) { $output = strtoupper($output); return $output; // Use this instead of the above and it works $test = strtoupper($output); return $test; } ?> It seems that an Apache child thread can process the script once before it crashes the child process. e.g. Refresh within KeepAliveTimeout seconds and it will crash; or with KeepAlive Off, it crashes after ThreadsPerChild requests. The "Apache.exe has generated errors..." box pops up. The only thing in Apache's error log is [info] master_main: Child processed exited prematurely. Restarting the child process. I have the "Dr. Watson" crash log file that was generated if it's of any use: http://www.realplain.com/phpcrash.txt BTW, that's weird; I just closed some apps that I usually have running so their processes wouldn't show up in that log and now I can't get the above script to crash every time (or at all!) like I could a few mins ago. Hmm... So don't know if you can reproduce it. However, the script where I originally noticed it is still crashing consistently as before. Thanks for your time. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=19668&edit=1