Doc #42585 [Ver->Csd]: die() in event handler => PHP hangs

Edit report at https://bugs.php.net/bug.php?id=42585&edit=1 ID: 42585 Updated by: phpdocbot@php.net Reported by: csaba at alum dot mit dot edu Summary: die() in event handler => PHP hangs -Status: Verified +Status: Closed Type: Documentation Problem Package: COM related Operating System: Win XP Pro PHP Version: 5.2.4 Assigned To: cmb Block user comment: N Private report: N New Comment: Automatic comment on behalf of cmb Revision: http://git.php.net/?p=doc/en.git;a=commit;h=e604424d6d60d5cd9489bec6312c20195abe2c07 Log: Fix #42585: die() in event handler =&gt; PHP hangs Previous Comments: ------------------------------------------------------------------------ [2020-11-04 13:39:07] cmb@php.net The problem here is that, prior to PHP 8.0.0, die() causes a so called "unclean shutdown", what prevents the unbinding of the bound event sink, causing a hang (or potentially other issue). Throwing an exception instead of calling die() would solve that. Given that this issue is fixed in PHP 8.0.0, I'm changing this to doc problem. ------------------------------------------------------------------------ [2007-09-07 11:04:43] jani@php.net Assigned to the COM maintainer. ------------------------------------------------------------------------ [2007-09-07 09:49:16] csaba at alum dot mit dot edu Description: ------------ If I have a COM object call into PHP (via com_event_sink or IE's window.setTimeout) with a die() within the called code, then PHP hangs. In the example below, IE comes up and waits around for 4 seconds, after which an $ie->quit() is issued. In the event handler (function OnQuit()) a die() is issued. While IE does shut down, PHP does not return me the command prompt. This is from PHP CLI, of course. Csaba Gabor from Vienna Reproduce code: --------------- <?php class IESink { public $terminated = false; public function TitleChange($text) { echo("title has changed: $text \n"); } public function OnQuit() { print "Quitting\n"; die(); print "Died\n"; $this->terminated = true; } } $ie = new COM("InternetExplorer.Application"); $ie->Visible = true; $sink = new IESink; com_event_sink($ie, $sink, "DWebBrowserEvents2"); $ie->Navigate("http://www.php.net/"); $start = time(); $quitted = false; while (!$sink->terminated) { com_message_pump(200); if (time()-$start>4 && !$quitted) { $quitted=true; $ie->quit(); } } print "Finished!\n"; ?> Expected result: ---------------- I expect to be shown the following three lines, ie to go away, AND for PHP to terminate: title has changed: PHP: Hypertext Preprocessor title has changed: PHP: Hypertext Preprocessor Quitting Actual result: -------------- The above 3 lines are shown, IE goes away, BUT php does not terminate. Also, note that if I manually shut IE down, instead of waiting the 4 seconds, then I get the following additional line (and PHP still hangs the cmd prompt): Fatal error: Call to undefined method com::quit() in Unknown on line 0 It seems to me that the while loop stays active, since that's the only place that $ie->quit() is issued. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=42585&edit=1