<?php
  

  function getSpiralArray($n)
  

  {
  

  $pos = 1;
  

  $count = $n;
  

  $value = -$n;
  

  $sum = -1;
  

  do
  

  {
  

  $value = -1 * $value / $n;
  

  for ($i = 0; $i < $count; $i++)
  

  {
  

  $sum += $value;
  

  $result[$sum / $n][$sum % $n] = $pos++;
  

  }
  

  $value *= $n;
  

  $count--;
  

  for ($i = 0; $i < $count; $i++)
  

  {
  

  $sum += $value;
  

  $result[$sum / $n][$sum % $n] = $pos++;
  

  }
  

  } while ($count > 0);
  

  return $result;
  

  }
  

  

  function PrintArray($array)
  

  {
  

  for ($i = 0; $i < count($array); $i++) {
  

  for ($j = 0; $j < count($array); $j++) {
  

  echo str_pad($array[$i][$j],3,' ');
  

  }
  

  echo "\n";
  

  }
  

  }
  

  

  $arr5 = getSpiralArray(5);
  

  PrintArray($arr5);
  

  $arr6 = getSpiralArray(6);
  

  PrintArray($arr6);
  

  

  ?>