What is the sound produced by words with pH?

For example:

* Phone - /fōn/

* Pharaoh - /ˈferoʊ/

* Pharmacy - /ˈfɑːrməsi/

* Phase - /feɪz/

This is because the "ph" combination in English represents the voiceless labiodental fricative sound, which is the same sound produced by the letter "f".