elFinder\elFinderVolumeDriver::canCreateTmb PHP Метод

    protected function canCreateTmb($path, $stat)
    {
        return $this->tmbPathWritable && strpos($path, $this->tmbPath) === false && $this->imgLib && strpos($stat['mime'], 'image') === 0 && ($this->imgLib == 'gd' ? $stat['mime'] == 'image/jpeg' || $stat['mime'] == 'image/png' || $stat['mime'] == 'image/gif' : true);
    }