使用phpseclib在Laravel中进行实时SSH输出

Question

I've tried different SSH libraries but they don't seem to work too well in Laravel. Since I got phpseclib to work well, I'm trying to stick with it. But, I'm not seeing a way to have a live output from the SSH connection.

Some things that I plan on running can take up to a few hours to finish but the software being accessed always prints out a percentage of completion that I'd like to utilize to display in the browser.

Currently, I have this:

    <?php

    use phpseclib\Net\SSH2;
    use phpseclib\Crypt\RSA;

    $key = new RSA();
    $key->loadKey(file_get_contents('key.pem'));

    $command = 'ping google.com';

    $ssh = new SSH2('awesomeserver.com');

    if (!$ssh->login('username', $key))
    {
        echo 'Login Failed';
    }
    else
    {
        echo $ssh->exec($command);
    }

    ?>

This just waits until the command is complete and then just barfs it all onto the screen.

Previously, in the else bracket, I had while(@ ob_end_flush());

    $proc = $ssh->exec($command);

    while(!feof($proc))
    {
        echo fread($proc, 4096);
        @ flush();
    }

But, $proc was only recognized as a string instead of a resource, so it didn't work.

Do you all have any other suggestions, other than using a different library?

Thanks!

EDIT (Partial solution):

I eventually got this script to work by utilizing the read() function with this: while(@ ob_end_flush());

    $ssh->write($command.'\n');

    while($read = $ssh->read())
    {
        echo $read;
        @ flush();
    }

Answer 1

You could employee a callback. eg.

$ssh->exec('ping 127.0.0.1', function($output) {
    echo $output;
});