ansaurus

Question

Answer 1

+5 A:

($x >> 1) & 1

Andrey 2010-04-15 08:26:24

And function to get nth bit:function nbit($number, $n) { return ($number >> $n-1) }

Tomasz Struczyński 2010-04-15 08:32:19

stereofrog 2010-04-15 10:12:30

@stereofrog: you're right, but for nth bit, you've to find out pow(2, n-1) which is again done by shifting.

understack 2010-04-17 10:43:32

Answer 2

+1 A:

Nice answer by Andrey, definitely go with his solution. Here's another way to do it though, using string manipulation (I know, I know...):

substr(decbin($x), -2, 1)

deceze 2010-04-15 08:31:34

holy sh.. that's even more difficult to read then bit shifts. However very original way of doing this.

Pim Jager 2010-04-15 08:38:36

@Pim Lol, thanks. Logically it's pretty straight forward though, maybe too much so. ;)

deceze 2010-04-15 08:41:34

How to get nth bit (from right) in a binary equivalent of an integer in PHP?