function array_range($from, $to, $step=1){$array = array();for ($x=$from; $x <= $to; $x += $step){$array[] = $x;}return $array;}print_r(array_range(0, 20, 5));/*returns:Array([0] => 0[1] => 5[2] => 10[3] => 15[4] => 20)*/