The person who sees the door of heaven in his dream means that he will soon open the doors of fortune and luck and will be rewarded with great sustenance. The dreamer will be a wise person, and everything he desires will be granted to him by Allah.
It indicates that the dreamer, who is very sad and worried because of the financial and spiritual problems he has been living for a long time, will soon make great profits, gain great success, and obtain a very good and large amount of sustenance, with Allah's permission.