使用自定义异常处理程序（set_exception_handler）时，不会自动记录异常

Question

I want to use a custom exception handler (set with set_exception_handler() function) to control what is printed to a user when unhandled exception occurs.

Unfortunately, in this case exception is not logged to a php error log and I don't want to write my own logging code because automatic exception logging was absolutely ok for me.

The question is:
Is there a way to make PHP log exception (as by default) if custom exception handler was executed? If no, is there a way to log into main php error log file?

Answer 1

Is there a way to make PHP log exception (as by default) if custom exception handler was executed?

No, not from what PHP offers (e.g. return FALSE in the callback).

If no, is there a way to log into main php error log file?

Yes, you can use the error_log^Docs function for that. The Exception^Docs should contain the message as well as file name and line number. I don't have any code for that at hand, otherwise I've added/linked it.

One more or less dirty trick (but I'm not sure if it preserves the original filename and line-number) is to create an exception capturing object that remains in memory all the time. If it captures an uncatched exception, it will handle it and store it. In case of destruction (at the end of the process) it can re-throw it. Then PHP needs to deal with it and probably logs it. However I would consider that experimental.