test.php

<?php

use Symfony\Component\Finder\Finder;
use Yosymfony\ResourceWatcher\ResourceCacheFile;
use Yosymfony\ResourceWatcher\ResourceWatcher;

require_once 'vendor/autoload.php';

$finder = new Finder();
$finder->files()
  ->name('*.php')
  ->depth(10)
  ->in(__DIR__);

$cache = new ResourceCacheFile('/tmp/foo/cache.php');
$watcher = new ResourceWatcher($cache);
$watcher->setFinder($finder);

for ($i = 0; $i < 200; $i++) {
    $watcher->findChanges();

    echo "$i: " . ($watcher->hasChanges() ? 'yes' : 'no') . "\n";

    usleep(250000);
}