ontdubbelen pokes

<?php
## If dir exists, maintain cache so that messages don't repeat themselves
if (is_dir(__DIR__ . '/cache')) {

    $filename = __DIR__ . '/cache/' . hash('crc32b', $poke_id.$gone);

    if(!file_exists($filename)) {
        file_put_contents($filename, "$poke_id $poke $gone\n");
    } else {
        exit;
    }

    # Check if files are older than 15 minutes
    if ($handle = opendir(__DIR__ . '/cache')) {
        while (false !== ($entry = readdir($handle))) {
            if ($entry != "." && $entry != "..") {
                $leeftijd = (time() - filemtime(__DIR__ . '/cache/'.$entry));
                if ($leeftijd > 900) {
                    unlink(__DIR__ . '/cache/'.$entry);
                }
            }
        }
        closedir($handle);
    }
}
?>