Italian and Spanish subbed ⟨PH⟩ with ⟨F⟩ ages ago; examples here and here. Portuguese stopped using it in 1911 (ACL / “European” standard) asd 1943 (ABL / “Brazilian”) standard.

In Portuguese it was part of a wider wave of orthographic reforms, that also got rid of etymological double consonants and ⟨Y⟩. A lot of people were hilariously annoyed, example stolen from Wikipedia:

Imaginem esta palavra phase, escripta assim: fase. Não nos parece uma palavra, parece-nos um esqueleto (…) Affligimo-nos extraordinariamente, quando pensamos que haveriamos de ser obrigados a escrever assim!

Imagine this word phase, written like this: fase. It doesn’t resemble us a word, it resemble us a skeleton. (…) We get profoundly afflicted, when we think that we would be required to write it like this!