php shell_exec with realtime updating

Question

I have this shell program that I want to execute by php. The problem is that it can potentially take a long time, and as of that I need it to have real-time updating to the

Answer 1

try this code (tested on Windows machine + wamp server)

        header('Content-Encoding: none;');

        set_time_limit(0);

        $handle = popen("<<< Your Shell Command >>>", "r");

        if (ob_get_level() == 0) 
            ob_start();

        while(!feof($handle)) {

            $buffer = fgets($handle);
            $buffer = trim(htmlspecialchars($buffer));

            echo $buffer . "
";
            echo str_pad('', 4096);    

            ob_flush();
            flush();
            sleep(1);
        }

        pclose($handle);
        ob_end_flush();