pecl_inotifyを使ったディレクトリ監視（適当版）

gistfile1.php

<?php
$fd = inotify_init();
$desc = inotify_add_watch($fd,"directory",IN_CLOSE_WRITE);
chdir(__DIR__);

array_shift($_SERVER["argv"]);
$command = __DIR__ . "/" . join(" ", $_SERVER["argv"]);

while($events = inotify_read($fd))
{
  $files = array();
  foreach($events as $event){
    if(!in_array($event["name"],$files)){
      $files[] = $event["name"];
    }
  }
  
  foreach($files as $file){
    passthru($command . $file);
  }
}