purify example

$textKey = $hash . md5($text);
        if (isset($this->cache[$textKey])) {
            return $this->cache[$textKey];
        }

        if (!isset($this->purifiers[$hash])) {
            $config = $this->getConfig($options, $override, $field);
            $this->purifiers[$hash] = new \HTMLPurifier($config);
        }

        $this->cache[$textKey] = $this->purifiers[$hash]->purify($text);

        return $this->cache[$textKey];
    }

    private function getBaseConfig(): \HTMLPurifier_Config
    {
        $config = \HTMLPurifier_Config::createDefault();

        if ($this->cacheDir !== '') {
            $config->set('Cache.SerializerPath', $this->cacheDir);
        }