utils.php

<?php
/*
 * Part of TI-Planet's Project Builder
 * (C) Adrien "Adriweb" Bertrand
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

function cacheBusterPath($filepath = '')
{
    if (empty($filepath)) {
        return '';
    }
    $fs_path = __DIR__ . '/' . $filepath;
    if (!is_readable($fs_path))
    {
        return $filepath;
    }
    return $filepath . '?t=' . filemtime($fs_path);
}