/**
* Purify HTML.
- * @param $html String HTML to purify
- * @param $config Configuration to use, can be any value accepted by
+ * @param string $html String HTML to purify
+ * @param mixed $config Configuration to use, can be any value accepted by
* HTMLPurifier_Config::create()
+ * @return string
*/
-function HTMLPurifier($html, $config = null) {
+function HTMLPurifier($html, $config = null)
+{
static $purifier = false;
if (!$purifier) {
$purifier = new HTMLPurifier();