Where do I find the php conf file?

I’m going through the security setup for Dolibarr v3.5.4. When I click to Activate the Database password encrypted in conf.php (Activated recommended) parameter, a prompt opens as follows:

      "To have password encoded into the conf.php file, replace the line 
                              $dolibarr_main_db_pass='...' 
      by 
                               $dolibarr_main_db_pass='crypted: …' "

Where is conf.php located?

in webserver dolibarr–>htdocs --> conf --> conf.php

Thanks, sleks!

I used bitnami to set up my server, so the path is a little different [lampstack-x.x.xx-x/apps/dolibarr/htdocs/conf].

Ooops. full path should have been: //opt/lampstack-x.x.xx-x/apps/dolibarr/htdocs/conf/conf.php

You can Activate the Database password encryption from Setup → Security → Tab: Passwords → Parameters
and Activate
“Encrypt database password stored in conf.php. It is strongly recommended to activate this option.”

I use Dolibarr Ver. 15.0.3