The bitwise operators enable you to treat an integer as the series of bits used to represent it
PHP’s Bitwise Operators
| Operator | Name | Use | Result |
|---|---|---|---|
| & | Bitwise AND | $a & $b | Bits set in $a and $b are set in the result |
| | | Bitwise OR | $a | $b | Bits set in $a or $b are set in the result |
| ~ | Bitwise NOT | ~$a | Bits set in $a are not set in the result and vice versa. |
| ^ | Bitwise XOR | $a ^ $b | Bits set in $a or $b but not in both are set in the result. |
| >> | Left shift | $a << $b | Shifts $a left $b bits |
| << | Left shift | $a << $b | Shifts $a left $b bits |