OB Start before Session Start to Avoid Header Already Sent Error in PHP?

To avoid 'headers already sent' error message can I use obstart before session start in PHP, like below:

// db information here
ob_start();
session_start();

Is this a good practice to use in every PHP project to avoid 'header already sent error' or it is for special cases?

Answer

It's not a good practice.

The only correct solution - is to not send anything before you run session.

It's not for special cases, it's for people who cannot write properly. Treat it as a dirty hack for newbies.