Comment by Ipseeta Priyadarshini on "What's the benefit of log file (PHP,Java etc), and how to create a good log file that our app can benefit from?"

The logger gives you the ability to define different levels of importance of the logged messages and the ability to use different sink for the output - the console, a file, etc.

Also it's easy to enable or disable only some type of message when using a logger - for example you don't want to see every debug message in production.

We can also use logger for profiling i.e; it can become a good tool to profile sections of a program, for instance by logging the start and end of an operation.

Creating a good log file:

Add remediation information to the log message, or if not possible, what was the purpose of the operation, and it’s outcome.
Add proper context : User operation succeeds ❌ User 54543 successfully registered e-mail user@domain.com ✅
Log should not be too much or too little

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