Dir watcher prototype

dirw.php

<?php

  class dir_watcher {

    private $dir;
    private $files;
    
    public function __construct($dir = '.') {
      $this->dir = realpath($dir) . DIRECTORY_SEPARATOR;
      $this->get_file_timestamps();
      echo "Monitoring dir: " . $this->dir . PHP_EOL;
      $this->run();
    }
    
    private function get_file_timestamps() {
      $this->files = array();
      $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($this->dir),
        RecursiveIteratorIterator::SELF_FIRST);
      foreach ($iterator as $path) {
        if (!$path->isDir()) {
          $this->files[$path->__toString()] = filemtime($path->__toString());
        }
      }
    }
    
    private function check() {
      foreach ($this->files as $file => $mtime) {
        $ntime = filemtime($file);
        if($ntime != $mtime) {
          echo "[".date("H:i:s d-m-Y")."] File modification found." . PHP_EOL;
          return true;
        }
      }
      return false;
    }
    
    private function action() {
      system("php vendor/taghouse/installer/Installer.php");
      $this->get_file_timestamps();
    }
    
    private function run(){
      while(true) {
        if($this->check())
          $this->action();
        sleep(3);
      }
    }
  }
  
  new dir_watcher();