문장에 나온 (ph)는 무슨 뜻인가요?

“Derek Jakons (ph) hadn’t seen his mother in eight months.”
“Most of the salt in this general area has been going towards the middle (ph) lands for the super bowl.”
“This thing is made out of manila (ph) folders, built to scale, detailed to perfection you can almost feel the turbulence, you all.”
여기서 이름과 단어 뒤에 붙은 (ph)는 무슨 뜻인가요?