How to open and close a process with PHP?

Question

How to open and close a process with PHP?

Right now I open a process with the following code:

$zoutput = array();
if( ($fp = popen("7za t \"".$path."\" * -r", "r")) ) {
    while( !feof($fp) ){
        $fread = fread($fp, 1024);
        $line_array = preg_split('/\n/',$fread);
    foreach($line_array as $a) {
        if($a != "") {
        $zoutput[] = $a;
        }
    }
        //$_SESSION['job'][$jobid]['currentfile'] = $_SESSION['job'][$jobid]['currentfile']+1;

        flush();
    }
    pclose($fp);
}

I'm looking into a solution to close the process in case the user want to abort. Even if I stop the php script, the process still runs in the background (and that's normal) but I can't find a way to close/terminate it under Windows.

Does anyone have an idea on how I can do that? Thank you.

EDIT to fit mallix's answer:

$zoutput = array();
    if( ($fp = popen("7za a -t7z ".$GLOBALS["backup_compression"]." \"".$_SESSION['job'][$jobid]['bFQN']."\" \"".$pathtobackup."\"", "r")) ) {
        while( !feof($fp) ){
                    //Verifying if the user want to abort the process
            if(isset($_SESSION['job'][$jobid]['AbortCurrentJob']) && ($_SESSION['job'][$jobid]['AbortCurrentJob'] == 1)) {
                pclose($fp);
                return;
            }
            $fread = fread($fp, 1024);
            $line_array = preg_split('/\n/',$fread);
            foreach($line_array as $a) {
                if($a != "") {
                    $zoutput[] = $a;
                }

            }
            //$_SESSION['job'][$jobid]['currentfile'] = $_SESSION['job'][$jobid]['currentfile']+1;

            flush();
        }
        pclose($fp);
    }
    echo json_encode($zoutput);

Unfortunatly the 7zip stanalone console process still run in the background. the value of the session variable is a 1 (integer) confirmed.

Edit ..:I just noticed that the request to change the session variable with jquery is waiting.... until the first script is complete. So, useless :(

score 0 · Answer 1 · answered Jan 16 '13 at 18:39

0

In your php script, check every time if a specific session is set before looping again.
When user clicks ABORT terminate that session key.
This can also be implemented using database instead of sessions.

answered Jan 16 '13 at 18:39

mallix

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Thanks for the tip mallix. It's not too slow to check a $_SESSION variable each loop? And do you know if it's possible in any way to get more details about the command progress? – Jeremy Dicaire Jan 16 '13 at 18:57
1

No its not slow at all. You can count the lines parsed or even catch the last line parsed and inform back the user. – mallix Jan 16 '13 at 19:07
Done. (and thanks) But it's not working, the process still run in the background (Task Manager) – Jeremy Dicaire Jan 16 '13 at 19:38

How to open and close a process with PHP?

1 Answers1