python to php conversion

Question

I'm trying to convert parts of a python script into php. I know most of it, but I've run into something to do with bitshifting (i think?) which I don't have much experience in even in PHP! Can somebody translate this python function into php please?

def setBit(value, position, on):
    if on:
        mask = 1 << position
        return (value | mask)
    else:
        mask = ~(1 << position)
        return (value & mask)

score 7 · Accepted Answer · 2012-01-20 01:53:40Z

7

function setBit($value, $position, $on = true) {
    if($on) {
        return $value | (1 << $position);
    }
    return $value & ~(1 << $position);
}

edited Jan 20, 2012 at 1:53

answered Jan 20, 2012 at 1:43

user142162

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1 Comment

Landon Over a year ago

wow, that's just embarrassing, it's like a carbon copy of the python function! I guess I've just never used the << operator before, anyway, thanks!

Robert Allan Hennigan Leahy · Accepted Answer · 2012-01-20 01:45:38Z

4

function SetBit ($value, $position, $on) {

    if ($on) return ($value|(1<<$position));

    return ($value&(~(1<<$position)));

}

answered Jan 20, 2012 at 1:45

Robert Allan Hennigan Leahy

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2 Comments

DaveRandom Over a year ago

This could be reduced to one line, if you're going to take that approach: return ($on) ? $value | (1 << $position) : $value & ~(1 << $position);

Robert Allan Hennigan Leahy Over a year ago

I love that little ternary operator, so good at making code more compact. My goal wasn't actually one line, my goal was to eliminate intermediary variables. I hate assigning anything to a variable that isn't going to be used more than once...a hang up of mine...

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