simple inline logger for magento 2 to do simple testing on things that cant dump to page.

gistfile1.txt

      $writer = new \Zend\Log\Writer\Stream(BP . '/var/log/logfile.log');
      $logger = new \Zend\Log\Logger();
      $logger->addWriter($writer);
      $logger->info('message/var to log');

or try this for 2.3.4
$writer = new \Zend_Log_Writer_Stream(BP . '/var/log/vsp.log'); $logger = new \Zend_Log(); $logger->addWriter($writer); $logger->info('text message');