And the heaven is opened and will become gateways (78:19)

Almuntakhab Fi Tafsir Alquran Alkarim

and the heaven is opened typifying open doors for the adminission of all

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(78:19) and when the sky shall be opened up and will become all doors;

And the heaven is opened and will become gateways meaning

*12) This implies the final sounding of the Trumpet at which all dead men will rise back to life forthwith. "You" implies not only those who were the addressees at that time but all those humans who will have been born from the beginning of creation till Resurrection. (For explanation, see E.N. 57 of Ibrahim, E.N. 1 of AlHajj, E.N.'s 46, 47 of Ya Sin, E.N. 79 of Az-Zumar).
 

And the heaven is opened and will become gateways meaning in Urdu

اور آسمان کھول دیا جائے گا حتیٰ کہ وہ دروازے ہی دروازے بن کر رہ جائے گا