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<?php
namespace Jerodev\Diglett\CssFilters;
use Symfony\Component\DomCrawler\Crawler;
class NthFilter implements ICssFilter
{
private $parameters;
public function __construct(array $parameters)
$this->parameters = $parameters;
}
public static function getFunctionName(): string
return 'nth';
public function filterNodes(Crawler $crawler): ?Crawler
// Nth needs one parameter
if (count($this->parameters) === 0) {
throw new \ErrorException(':nth(x) css selector should have at least one parameter');
// If not enough nodes in the list, return null
$count = intval($this->parameters[0]);
if ($crawler->count() < $count) {
return null;
// Get the nth element
return $crawler->eq($count - 1);
jerodev /
diglett
