PHP8 fix with parse_str missing second param

[jaygilmore]

PHP requires the second parameter for parse_str().

[BenceSzalai]

While this patch fixes the PHP error when not used as an output filter, it breaks it still when being used as one. A proper fix would look like this from line 51:

if (isset($options)) {  // if we're being called as an output filter, set variables for any options
	parse_str($options, $optionsArray);
	extract($optionsArray);
}