فُتِحَ الْبَابُ.
Futiḥa is passive past; al-bābu is nominative as nāʾib fāʿil.
Opening interactive controls...
The Passive Verb First
Ism al-Mafʿūl: Formation, Weak Roots and Government
فُتِحَ الْبَابُ.
Futiḥa is passive past; al-bābu is nominative as nāʾib fāʿil.