getPid example

    private function doSignal(int $signal, bool $throwException): bool
    {
        if (null === $pid = $this->getPid()) {
            if ($throwException) {
                throw new LogicException('Cannot send signal on a non running process.');
            }

            return false;
        }

        if ('\\' === \DIRECTORY_SEPARATOR) {
            exec(sprintf('taskkill /F /T /PID %d 2>&1', $pid), $output, $exitCode);
            if ($exitCode && $this->isRunning()) {
                if ($throwException) {
                    

    private function doSignal(int $signal, bool $throwException): bool
    {
        if (null === $pid = $this->getPid()) {
            if ($throwException) {
                throw new LogicException('Cannot send signal on a non running process.');
            }

            return false;
        }

        if ('\\' === \DIRECTORY_SEPARATOR) {
            exec(sprintf('taskkill /F /T /PID %d 2>&1', $pid), $output, $exitCode);
            if ($exitCode && $this->isRunning()) {
                if ($throwException) {
                    

$this->expectExceptionMessage('The process has been signaled with signal "9".');
        if (!\function_exists('posix_kill')) {
            $this->markTestSkipped('Function posix_kill is required.');
        }

        if (self::$sigchild) {
            $this->markTestSkipped('PHP is compiled with --enable-sigchild.');
        }

        $process = $this->getProcessForCode('sleep(32.1);');
        $process->start();
        posix_kill($process->getPid(), 9); // SIGKILL
        $process->wait();
    }

    public function testRestart()
    {
        $process1 = $this->getProcessForCode('echo getmypid();');
        $process1->run();
        $process2 = $process1->restart();

        $process2->wait(); // wait for output