Is there any reason we're using the 2 suffix? I'm even thinking we shouldn't name the log specific to each application; we could just call it error_log or something similar.

In fact, is there a benefit to making the name configurable at all?

Is there any reason we're using the 2 suffix?

that's just as an example using same application name .

we could just call it error_log or something similar.

we can name it whatever we want to but better to named it as error_log which will confuse with PHP's default error log . and log does not only contains error but any debug, info, alert (basically any PSR log level) so error_log name does not justify it also .

In fact, is there a benefit to making the name configurable at all?

Truthfully not much , it's just a convenience. currently default named to application's name but we can have simple logs.log as default also . and not make it configurable .

I think we should just fix it as system.log or something. Filenames in the files directory shouldn't be configurable; they should be named consistently.

I say go for app.log as it is app's own log .

removed configurable log file name ability and set the log file name to app.log .