use bit system for test

[pelloq1]

Hello,

I want to use the bit system to check value

Sample :

$var=8;

if ($var&4) echo "var&4" ;
else echo "! var&4" ;

Why this test return "! var&4" ... ? the var content 4 ... Could you please help me

cedric pelloquin from switzerland

[Sxooter]

I'm not sure you understand bits. 8 is a binary string like this:

1000

4 is a binary string like this:

0100

so, anding them bitwise gets:

1000 & 0100 = 0000

Now, if you and 15 and 4, you'll get:

1111 & 0100 = 0100