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 could use array_keys to work only on the array keys.

$keys = array_keys($array);
for ($i=0, $n=min(count($keys), 130000); $i<$n; $i += 205) {
    $result[] = $array[$keys[$i]];
}