VKNotifier.php

<?php
$api_id = 1;
$api_secret = "APP_SERVICE_TOKEN";

$message_text = "Test";

$current_users_list = array();
$current_offset = 0;

function Send()
{
  global $current_users_list;
  global $current_offset;
  global $api_id;
  global $access_token;
  global $message_text;

  $current_users_list = array();

  $query = mysql_query("SELECT `id` FROM `users` LIMIT ".$current_offset.", 100");
  while($row = mysql_fetch_assoc($query))
  {
    $current_users_list[] = $row['id'];
  }

  $current_offset += sizeof($current_users_list);
  //
  file_get_contents("https://api.vk.com/method/secure.sendNotification?user_ids=".implode(",", $current_users_list)."&message=".$message_text."&client_id=".$api_id."&client_secret=".$api_secret);

  if(sizeof($current_users_list) != 0)Send();
}

?>