Does divorce take effect with the words "If you leave the house, then you are divorced" if the wife does not hear the message until after she has left, and how is the reconciliation if it takes effect?

If you made a divorce conditional to prevent your wife from going out, and she was unaware of this condition, then the divorce does not occur, because had she known, she would not have disobeyed you. One must be cautious of marital disputes and avoid using divorce as a means to resolve issues.