For instance, this is taken from the Monolog library, which is now a reference in the PHP world:

```php
/**
* Adds a log record at the DEBUG level.
*
* @param  string  $message The log message
* @param  array   $context The log context
* @return Boolean Whether the record has been processed
*/
public function addDebug($message, array $context = array())
{
    return $this->addRecord(self::DEBUG, $message, $context);
}
```