Re: Starting a background process and reporting failure if applicable

On Mon, Aug 17, 2020 at 02:51:58PM -0400, Tedd Sperling wrote: > > > > On Aug 17, 2020, at 9:14 AM, 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 $? > > > > Regards, > > Janis > > > Janis: > > Look at header — it’s much simpler. > > For example, I often use it to start another script from within a script, like so: > > if ($auth == 0) > { > // send user to log on page > header('Location:log-on.php'); > exit(); > } > Yeah, but header doesn't run asynchronously does it? Plus, even if the "header" script returns, that exit() call will abort the parent script. Paul -- Paul M. Foster http://noferblatz.com http://quillandmouse.com