<?php
// Logs a notice
\Drupal::logger('my_module')->notice('@type: deleted %title.', [
'@type' => $this->entity->bundle(),
'%title' => $this->entity->label(),
]);
// Logs an error
\Drupal::logger('my_module')->error('@type: deleted %title.', [
'@type' => $this->entity->bundle(),
'%title' => $this->entity->label(),
]);
?>
<?php
try {
// some code
}
catch (\Exception $e) {
watchdog_exception('test', $e);
}
?>
Then, go to http://mydomain.com/admin/reports/dblog
Placeholder types
@variable — Use this style of placeholder for most use-cases. Special characters in the text will be converted to HTML entities.
%variable — Use this style of placeholder to pass text through drupal_placeholder() which will result in HTML escaped text, then wrapped with <em> tags.
:variable — Use this style of placeholder when substituting the value of an href attribute. Values will be HTML escaped, and filtered for dangerous protocols.
Reference:
https://drupalize.me/blog/201510/how-log-messages-drupal-8
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