<?php
   set_time_limit(0);
   /*
   If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

   Find the sum of all the multiples of 3 or 5 below 1000.
   */
   
   # first lets install some useful shit.
   
   $max=1000;
   $array = array();
   $id=0;
   
   for($loop=1;$loop < $max;$loop++) {
      if(($loop % 3) == 0) {
      $array[$id] = $loop;
      $id++;
      } elseif(($loop % 5) == 0) {
      $array[$id] = $loop;
      $id++;
      }
   }
   
  foreach($array as $id => $v) {
     $c += $v;
   }
   
    echo("Vastus: ".$c); 
?>