Monitoring Server-side process

[the_hole]

Hi all.

I need a help with an application that I'm developing. I have a process running in PHP using FIFOS (concretely a file compression) and I would like to update a progress bar with the state. My problem is that until the PHP script don't ends, the JS don't run.

I'm trying with Ext.Direct but I don't know if it's the correct way. I put the PHP script:

<?php
$sendPath = '/fifos/p2d';
$recvPath = '/fifos/d2p';

if (file_exists($sendPath)) {
    if (!file_exists($recvPath)) { 
          $old = umask(0);
        posix_mkfifo($recvPath, 0666);
        umask($old); 
    } 
    
    $fifo = @fopen($sendPath, 'w');
    fwrite($fifo, 'init', 5); 
    fclose($fifo);
 
    if (pcntl_fork == 0) {
        $data = "";
        $fifo = fopen($recvPath, 'r');
                //This While loop wait for server notifications like "10% completed"
        do {
            $data = fgets($fifo);
            if (trim($data) == '') break;
            else {
                [COLOR="red"]
                                This is the point where I would like to update the progress bar
                                [/COLOR]
            }
        } while (1);
        unlink ($recvPath);
    }
} 
?>

Thanks in advance and best regards