When should I use a bitwise operator?

Question

I read the following Stack Overflow questions, and I understand the differences between bitwise and logical.

• Difference between & and && in

Answer 1

Bitwise is useful for things in PHP just like anything else.

How about a value that can have multiple states turned on at the same time?

Output:

STATE_FOO's base2 value is 00000001
STATE_BAR's base2 value is 00000010
STATE_FEZ's base2 value is 00000100
STATE_BAZ's base2 value is 00001000

base10 value of $state is 5
base2 value of $state is 00000101
Does $state include FOO state? 1
Does $state include BAR state?
Does $state include FEZ state? 1
Does $state include BAZ state?
Is state equivalent to FOO and FEZ states? 1