Questions about BitWise Operators

[janhouse00]

Hello there, I hope somebody could teach me about
bitwise Operators. I faint when I saw the stuff below(the attached pic, they were grabbed from php manual).

Extra question: How come echoing 12⁹ will result in 5?

echo 12 ^ 9; // Outputs '5'

Helps are much appreciated.Thank you

[rharter]

12 in binary = 1100
9 in binary = 1001

$a^$b means return in each bit position a 1 if their is a one in that bit position in 12 or 9. So from above

0101 would be returned, which converted to base 10 is
5.

it's really quite simple, convert to binary, and perform the
operation on each bit position.

so 12 AND 9 would equal 1000 or 8
12 OR 9 would equal 1101 or 13

and so forth

ron

[janhouse00]

Thankx rharter