How do I detect if the CLI PHP process/window is closed with the "X" button?

Asked Sep 04 '20 at 05:55

Active Sep 04 '20 at 05:55

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I'm trying to handle the very common event of somebody closing a running PHP CLI terminal window by clicking its "X" button or by "killing" it from the command line with "taskkill".

By "handle", I mean "I want this quick but important function of mine to run before it ends".

I currently use register_shutdown_function(), which sounds like it would be perfect for this. However, in my tests, the function set by register_shutdown_function() is NOT called when the window is closed or the process is killed by other means, nor when Ctrl + C is pressed while it's running. It only is run when the script exited/ended on its own.

sapi_windows_set_ctrl_handler() does execute when Ctrl + C is pressed, but not when the window is closed, which is by far the most important and common way my PHP CLI processes are "unexpectedly" closed.

The pcntl_* functions cannot be used since they are Linux-only, while all my PHP code needs to be cross-platform.

Specs: PHP 7.4.10 on Windows 10 Pro 2004.

asked Sep 04 '20 at 05:55

Island Crumley

1

NT doesn't provide the notion of a graceful SIGTERM. And PHP, being a commandline tool, won't receive any [WM_QUIT](https://stackoverflow.com/questions/1216788/win32-api-analog-of-sending-catching-sigterm) from Windows. – mario Sep 04 '20 at 06:29
What window do you mean? The terminal? Or did you use any kind of GUI like GTK or QT? – Markus Zeller Sep 04 '20 at 10:20
@mario Well... Thanks, but how do I actually solve it? – Island Crumley Sep 04 '20 at 19:54
@MarkusZeller As mentioned, "PHP CLI terminal window". – Island Crumley Sep 04 '20 at 19:54
The short answer is: you probably can't. – mario Sep 05 '20 at 07:00
@mario But... Then everything I've worked on falls apart in the last fine-tuning stages... Please tell me there is a way. This can't be. – Island Crumley Sep 05 '20 at 07:03
Maybe you could try a workaround by using Docker. – Markus Zeller Sep 05 '20 at 12:54

How do I detect if the CLI PHP process/window is closed with the "X" button?

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