Drupal logging arrays with logger

In drupal 9 for logging you can use logger service to log array data in some readable format, by adding html code and print_r to array.

\Drupal::logger('my_module')->warning('<pre><code>' . print_r($responseObj, TRUE) . '</code></pre>');

my_module is type of log message, warning is severity method you call and $responseObj is array you need to put to log file to have some formatting.  Other options you can use include:

emergency($message, $context)

alert($message, $context)

critical($message, $context)

error($message, $context)

warning($message, $context)

notice($message, $context)

info($message, $context)

debug($message, $context)

Can be used as follows:

\Drupal::logger('my_module')->notice($message);

\Drupal::logger('my_module')->error($message);