pharext\ExecCmd::suExec PHP Method

    private function suExec($command, $verbose = null)
    {
        if (!($proc = proc_open($command, [STDIN, ["pipe", "w"], ["pipe", "w"]], $pipes))) {
            $this->status = -1;
            throw new Exception("Failed to run {$command}");
        }
        $stdout = $pipes[1];
        $passwd = 0;
        $checks = 10;
        while (!feof($stdout)) {
            $R = [$stdout];
            $W = [];
            $E = [];
            if (!stream_select($R, $W, $E, null)) {
                continue;
            }
            $data = fread($stdout, 0x1000);
            /* only check a few times */
            if ($passwd < $checks) {
                $passwd++;
                if (stristr($data, "password")) {
                    $passwd = $checks + 1;
                    printf("\n%s", $data);
                    continue;
                }
            } elseif ($passwd > $checks) {
                /* new line after pw entry */
                printf("\n");
                $passwd = $checks;
            }
            if ($verbose === null) {
                print $this->progress($data, 0);
            } else {
                if ($verbose) {
                    printf("%s", $data);
                }
                $this->output .= $data;
            }
        }
        if ($verbose === null) {
            $this->progress("", PHP_OUTPUT_HANDLER_FINAL);
        }
        return $this->status = proc_close($proc);
    }