Just found that following for some reason DOES delete the file

<?php

$stream = tmpfile();

pcntl_async_signals(true);
pcntl_signal(SIGINT, function() {
	exit(0);
});

while(true);

There is no way in PHP to clean up tmpfiles when script is terminated with ctrl+c in cross platform compatible way :(

ctrl+c = sigterm and so why should there be no way?

This is expected behavior.  The respective documentation has been
fixed in the meantime.

> There is no way in PHP to clean up tmpfiles when script is
> terminated with ctrl+c in cross platform compatible way :(

Well, at least there is a way on Windows as well:

<?php
$stream = tmpfile();
sapi_windows_set_ctrl_handler(function ($event) {exit;});
while(true);
?>