If anException
object is passed in the context data, it MUST be in the'exception'
key. Logging exceptions is a common pattern and this allows implementors to extract a stack trace from the exception when the log backend supports it. Implementors MUST still verify that the'exception'
key is actually anException
before using it as such, as it MAY contain anything. (https://www.php-fig.org/psr/psr-3/#13-context)