think\Process::close PHP Méthode

    private function close()
    {
        $this->processPipes->close();
        if (is_resource($this->process)) {
            $exitcode = proc_close($this->process);
        } else {
            $exitcode = -1;
        }
        $this->exitcode = -1 !== $exitcode ? $exitcode : (null !== $this->exitcode ? $this->exitcode : -1);
        $this->status = self::STATUS_TERMINATED;
        if (-1 === $this->exitcode && null !== $this->fallbackExitcode) {
            $this->exitcode = $this->fallbackExitcode;
        } elseif (-1 === $this->exitcode && $this->processInformation['signaled'] && 0 < $this->processInformation['termsig']) {
            $this->exitcode = 128 + $this->processInformation['termsig'];
        }
        return $this->exitcode;
    }