gistfile1.php

<?php

$m = 3;

$array = array_filter(range(23, 42), function($value, $index) use($m) {
    return $index % $m == 0;
}, ARRAY_FILTER_USE_BOTH);

var_dump($array);



array(7) {
  [0]=>
  int(23)
  [3]=>
  int(26)
  [6]=>
  int(29)
  [9]=>
  int(32)
  [12]=>
  int(35)
  [15]=>
  int(38)
  [18]=>
  int(41)
}