php - Asking for advice on TP5 exception handling source code issues

Question

In the TP5 source code Error.php file, there is the following code:

Is the mark in this code redundant? Aren’t the parameters accepted by the appException() function all objects based on the base class \Exception? Could you please tell me what kind of exception is not based on the base class \Exception?

Answer 1

If $e is written in the function declaration, it may be Exception or Throwable
http://www.php.net/manual/en/...