Get nth paragraph of html element
function getParagraph($number, $string){
$index = $number-1;
$matches = [];
if(!preg_match_all('#<p>(.*?)<\/p>#', $string, $matches))
throw new Exception('Geen beschrijving gecvonden');
$matches = $matches[1];
if(!array_key_exists($index, $matches))
throw new Exception("Only ".count($matches)." were found, you requested number {$number}");
return $matches[$index];
}