Creating multiple zip files

I have a problem in PHP / Laravel to create multiple zip files in synchronous mode, I copy all commands that are generated and squeeze into the shell, it performs beauty, but when I step into the PHP run it only generates the first file.

Controller code.

foreach ($passwords as $p){
            if($i == 0){
                $command = 'zip -u -j -P '.$p.' '.$dir.'/'.$count.'.zip '.storage_path().'/app/'.$directory.'/'.$file1->getClientOriginalName();
                $commands->push($command);
            }else{
                $command = 'zip --quiet -j -P '.$p.' '.$dir.'/'.$count.'.zip '.storage_path().'/app/'.$directory.'/'.($count+1).'.zip';
                $commands->push($command);
            }
            $count--;
            $i++;
        }
        foreach ($commands as $p){
            echo $p.'<br/>';
        }
        foreach ($commands as $c){
            $process = new Process($c);
            $process->start();
            sleep(10);
            if($process->isTerminated()){
                sleep(1);
            }
            if ($errorOutput = $process->getErrorOutput()) {
                throw new RuntimeException('Process: ' . $errorOutput);
            }
        }

Code that generated does not collect $ commands.

The script only generates the 50.zip file, it does not continue forward.