#!/usr/bin/php

$dirToWatch = '/mnt/files/films2/';     // don't forget trailing slash.
$destinationDir = '/mnt/files/films/';  // don't forget trailing slash.


$fd = null;
$watch_descriptor = null;

// gracefully exit handler (unregister inotify)
function sig_handler($signo) {
    if ($fd !== null) {
        if ($watch_descriptor !== null) {
            inotify_rm_watch($fd, $watch_descriptor);
        }
        fclose($fd);
    }
}
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP,  "sig_handler");
pcntl_signal(SIGINT, "sig_handler");


$fd = inotify_init();
$watch_descriptor = inotify_add_watch($fd, $dirToWatch, IN_CREATE|IN_DELETE);
while (true) {
    $events = inotify_read($fd);
    $filepath = $dirToWatch . $events['name'];
    $filename = $events['name'];

    // when a new file appears in dirToWatch
    if ($events['mask '] == IN_CREATE) {
        if (!is_link($destinationDir.$filename)) {
            symlink($filepath, $destinationDir.$filename);
        }
    }
    // when a file is removed from dirToWatch
    else if ($events['mask '] == IN_DELETE) {
        if (is_link($destinationDir.$filename)) {
            unlink($destinationDir.$filename);
        }
    }
}