Add an empty line at end of file according to PSR-2 on PhpStorm

You already have two answers for how to turn it on for ALL file types in IDE (in short: Settings/Preferences | Editor | General -> Ensure line feed at file end on Save).

In modern version (2020.3) that option has been reworded a bit. Now it says Ensure every saved file ends with a line break

To do this for .php files only you can do the following:

1. Install EditorConfig plugin (if you do not have it installed yet). In modern versions it is already bundled and enabled by default.
2. Create .editorconfig file in your project root (or whatever folder that would be where you want to apply such style -- it will be applied to files in this folder and below). If you have one already -- open and inspect it
3. Add rule for *.php files only -- property to use would be insert_final_newline

An example:

[*.php]insert_final_newline = true

Links:

• EditorConfig site
• List of supported proerties

someone said picture speaks louder :D

you will need to tick the Ensure line feed at file end on save box

In PhpStorm preferences go to:

Editor > General

Check the box "Other: Ensure line feed at file end on Save."

Just realize this affects all code files you edit in PhpStorm, not just PHP files.