Implied fī explains a relation of time/place; it is not an extra pronounced word.
Dahran: accusative.
Khalfa: accusative.
Dāri after explicit fī: genitive.
Parse the actual construction, not an imagined written preposition.
Opening interactive controls...
Do Not Confuse Meaning with Case
Al-Mafʿūl Fīhi: Adverbials of Time and Place
Implied fī explains a relation of time/place; it is not an extra pronounced word.
Dahran: accusative.
Khalfa: accusative.
Dāri after explicit fī: genitive.
Parse the actual construction, not an imagined written preposition.