Selecting every nth item from an array

Question

What would be the most efficient way to select every nth item from a large array? Is there a \'smart\' way to do it or is looping the only way?

Some points to c

Answer 1

You can't move the array pointer, it seems, more than once at a time. I would personally use this:

reset($source);
$next = true;
while($next === true){
    $result[] = current($source);
    for(i=0;i<205;i++){
        $next = next($source);
    }
}

If someone can find a function that can move the array pointer more than just one step at a time, you will have a better answer. I think this is good though.