Use Ubuntu's own php interpreter, this project is not under docker and not using docker's php environment | or you can say php cli
If php interpreter is not set for throughout the project, just see at the bottom of
project files, here is External Libraries
, press F4
on it and from the phpstorm's
dropdown, select the php interpreter
Create as many php files as you want | complete the test and submit the solution
To run a specif file directly under globally installed php cli, just go to that file and
ctrl + shift + F10