Aerys\WatcherProcess::countCpuCores PHP Method

    private function countCpuCores()
    {
        $os = stripos(PHP_OS, "WIN") === 0 ? "win" : strtolower(trim(shell_exec("uname")));
        switch ($os) {
            case "win":
                $cmd = "wmic cpu get NumberOfCores";
                break;
            case "linux":
                $cmd = "cat /proc/cpuinfo | grep processor | wc -l";
                break;
            case "freebsd":
                $cmd = "sysctl -a | grep 'hw.ncpu' | cut -d ':' -f2";
                break;
            case "darwin":
                $cmd = "sysctl -a | grep 'hw.ncpu:' | awk '{ print \$2 }'";
                break;
            default:
                $cmd = NULL;
                break;
        }
        $execResult = $cmd ? shell_exec($cmd) : 1;
        if ($os === 'win') {
            $execResult = explode("\n", $execResult)[1];
        }
        $cores = intval(trim($execResult));
        return $cores;
    }