This is one of the latest entries from the Stanford Encyclopedia of Philosophy. I am sure you will Laugh out loud and Learn with this amazing and interesting article,
Philosophy of Humor
Although most people value humor, philosophers have said little about it, and what they have said is largely critical. Three traditional theories of laughter and humor are examined, along with the theory that humor evolved from mock-aggressive play in apes. Understanding humor as play helps counter the traditional objections to it and reveals some of its benefits, including those it shares with philosophy itself.