Hi! I am actually a PHP programmer Not a Maths Guy .

I was making a strong Xor encryption function. While doing that I wondered on this three numbers (10, 20, 30).Code:10 Xor 20 Xor 30 Xor S results Se.g. Wherever I put the S it results to S if the numbers are 10, 20, 30 Why its happening ?? Please help .Code:10 Xor S Xor 30 Xor 20 results S