APlayer_Plugin::is_really_writable PHP Method

    private static function is_really_writable($file)
    {
        // Create cache directory if not exists
        if (!file_exists($file)) {
            mkdir($file, 0755);
        }
        // If we're on a Unix server with safe_mode off we call is_writable
        if (DIRECTORY_SEPARATOR === '/' && (version_compare(PHP_VERSION, '5.4', '>=') or !ini_get('safe_mode'))) {
            return is_writable($file);
        }
        /* For Windows servers and safe_mode "on" installations we'll actually
         * write a file then read it. Bah...
         */
        if (is_dir($file)) {
            $file = rtrim($file, '/') . '/' . md5(mt_rand());
            if (($fp = @fopen($file, 'ab')) === FALSE) {
                return FALSE;
            }
            fclose($fp);
            @chmod($file, 0777);
            @unlink($file);
            return TRUE;
        } elseif (!is_file($file) or ($fp = @fopen($file, 'ab')) === FALSE) {
            return FALSE;
        }
        fclose($fp);
        return TRUE;
    }