View file darkworld/files/monstrs.php

<?php
$duuu=opendir("data/monstrs"); 
$all = 0; 
while(($k=readdir($duuu))!==false){ 
if ($k=='.'||$k=='..'||$k=='.htaccess'||$k=='index.php') continue; $all++;} closedir($duuu);
echo'Монстров: '.$all.'<br/>';
?>