What is the ruling on a husband saying to his wife: "Consider yourself divorced as of this night"; does this constitute a divorce, and what is the ruling regarding a second divorce?

The husband's statement to his wife, "Consider yourself divorced from this night," is an explicit divorce. So, if night falls, she is divorced. The husband's claim that he did not intend divorce is not accepted because his statement is explicit, and intention is not considered if it contradicts an explicit declaration.