public function limit(): int
    {
        $limits = [PHP_INT_MAX]; // Initialize.

        if (($max_upload_size = ini_get('upload_max_filesize'))) {
            $limits[] = $this->c::abbrToBytes($max_upload_size);
        }
        if (($post_max_size = ini_get('post_max_size'))) {
            $limits[] = $this->c::abbrToBytes($post_max_size);
        }
        if (($memory_limit = ini_get('memory_limit'))) {
            $limits[] = $this->c::abbrToBytes($memory_limit);
        }
        return $max = min($limits);
    }