You can install the PHPoC library via Arduino IDE.
Run the Arduino IDE.
Click the [Sketch] > [Include Library] > [Manage Libraries...] menu.
Search "phpoc" on the Library Manager.
Select the PHPoC library and press the [Install] button.
"INSTALLED" message will appear on success.
Confirm the "PHPoC" in the [Scketch] > [Include Library] > [Contributed libraries].
Confirm the "PHPoC" in the [File] > [Examples] > [Examples from Custom Libraries].
※ Note : PHPoC Expansion library can be installed in the same way.