Use of undefined constant parent - assumed 'parent' (this will throw an Error in a future version of PHP)

[JamesPJ]

On PHP 7.4.6 I'm getting below error.

ErrorException 

  Use of undefined constant parent - assumed 'parent' (this will throw an Error in a future version of PHP)

  at vendor/danhunsaker/laravel-flysystem-service/src/FlysystemManager.php:111
    107|                 return $this->createFlysystem(new \League\Flysystem\Replicate\ReplicateAdapter($this->disk($config['master'])->getAdapter(), $this->disk($config['replica'])->getAdapter()), $config);
    108|             });
    109|         }
    110| 
  > 111|         if (class_exists('\League\Flysystem\Sftp\SftpAdapter' && !method_exists(parent, 'createSftpDriver'))) {
    112|             $this->extend('sftp', function ($app, $config) {
    113|                 return $this->createFlysystem(new \League\Flysystem\Sftp\SftpAdapter($config), $config);
    114|             });
    115|         }

      +17 vendor frames 
  18  [internal]:0
      Illuminate\Foundation\Application::Illuminate\Foundation\{closure}(Object(Danhunsaker\Laravel\Flysystem\FlysystemOtherServiceProvider))

      +5 vendor frames 
  24  artisan:37
      Illuminate\Foundation\Console\Kernel::handle(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

After changing occurrence of method_exists(parent, ....) to method_exists(parent::class, ....). I was able to get it work.

[Ashley Upson]

Also fixed by changing parent usages on lines 90 and 111 to get_parent_class($this).

[Hennik Hunsaker]

By skipping the function call and its associated overhead, parent::class is the more efficient approach, so that's what I went ahead and used in the latest commit. I'll tag it in a moment.