Re: Starting a background process and reporting failure if applicable

Thank you for the pointer! I wanted to not manage it in that good way. :) And the parent script does not need to know the result of the other process. I just wanted to being able to monitor the errors. In case of some errors in the other process script, it would write them to an error log that I would monitor. But the errors I cannot find how to monitor easily, would happen upon launching the script (e.g., the script file does not exist, is not accessible or something like that). For now, I just do without monitoring the sub-process starting error monitoring. Regards, Janis trešd., 2020. g. 19. aug., plkst. 18:51 — lietotājs Alexandru Pătrănescu (< drealecs@gmail.com>) rakstīja: > Hi, > > I would recommend using a library that manages this in a good way: > > > https://symfony.com/doc/current/components/process.html#running-processes-asynchronously > This way you can start a process and wait for it to finish and obtain > it's exit code once it's done. In the meantime you can even feed it > with input and fetch it's output. > > There are other libraries that do that, not only symfony process but > this one is usually my first choice as it works in all environments > windows/linux and it's well tested and used a lot. > > Regards, > Alex > > On Mon, Aug 17, 2020 at 4:15 PM Jānis Elmeris <janis.elmeris@lv.lv> wrote: > > > > Hello! > > > > I would like to start a PHP script in the background from within another > PHP script. I would like to monitor all error cases properly. > > > > Is there an easy way to see if that background script was started > successfully? The background script would write its errors into an error > log that I'm monitoring. But what about starting the script itself? > > > > I'm trying to start a background script like this: > > > > exec('nohup php sleeps.php > /tmp/tt 2>&1 &', $output, $status); > > error_log('execute_shell: ' . var_export(['status' => $status, > > 'output' > => $output], true)); > > exec('nohup php sleeps_nonexist.php > /tmp/tt 2>&1 &', $output, > > $status); > > error_log('execute_shell: ' . var_export(['status' => $status, > > 'output' > => $output], true)); > > > > The first exec runs all right in the background > > (asynchronously). > > The second one behaves in exactly the same way ($status === > > 0), even > though file "sleeps_nonexist.php" does not exist. > > > > Running in the command line manually, this would give status > > 0: > > nohup php sleeps.php > /tmp/tt 2>&1 > > echo $? > > > > This would give status 1: > > nohup php sleeps_nonexist.php > /tmp/tt 2>&1 > > echo $? > > > > Regards, > > Janis >