/** * Show an information of what will happen * * @return void */ public function preview() { parent::preview(); $fn = $this->get('callback'); if (is_string($fn)) { $name = $fn; } elseif (is_array($fn)) { $name = (is_object($fn[0]) ? get_class($fn[0]) . '->' : $fn[0] . '::') . $fn[1]; } else { $name = 'anonymous function'; } $this->console->output('Calling ' . $name, OutputInterface::VERBOSITY_DEBUG); }