Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Send a signal to a process
<?php posix_kill(int $process_id, int $signal): bool
<?php         });



        $this->loop->futureTick(function () {

            posix_kill(posix_getpid(), SIGUSR1);

        });



        $this->loop->run();
<?php         $this->loop->addSignal(SIGUSR1, $func);



        $this->loop->addTimer(0.4, function () {

            posix_kill(posix_getpid(), SIGUSR1);

        });

        $loop = $this->loop;

        $this->loop->addTimer(0.9, function () use (&$func, $loop) {
<?php         } else if ($childPid === 0) {


            usleep(20000);

            posix_kill($currentPid, constant($signal));

            die();

        }

    }