PHP vs JavaScript, Bitwise Operators

Question

I have a function in JavaScript:

function myFunc(a, b, c)
{
  return (a ^ (b | (~c)));
}

And Equivalent in PHP:

function myFunc($a, $b, $c)
{
    return ($a ^ ($b | (~$c)));
}

The result for them are not the same:

myFunc('123', '4434', '355'); // PHP = ��� (Unknown Characters)
myFunc('123', '4434', '355'); // JavaScript = -91

What is wrong here?

Answer 1

In PHP you need to cast manually to integer

function myFunc($a, $b, $c)
{
    return ((int)$a ^ ((int)$b | (~(int)$c)));
}