<?php

use Symfony\Component\Finder\Finder;

$finder   = new Finder();
$fileIter = $finder->files()
    ->in(__DIR__ . '/../database/')
    ->date('>= ' . date('c', $lastSeeded))
    ->getIterator();
$fileIter->rewind();
if ($fileIter->current()) {
    //at least one was changed since last seeding
    return;
}