InvalidArgumentException The current node list is empty - php

Question

i am trying web scraping so i get this error on "\vendor\symfony\dom-crawler\Crawler.php:552"
here is the crawler.php code what the browser showed me:
#throws \InvalidArgumentException When current node is empty
*/
public function text(string $default = null, bool $normalizeWhitespace = true): string
{
if (!$this->nodes) {
if (null !== $default) {
return $default;
}
throw new \InvalidArgumentException('The current node list is empty.');
}
$text = $this->getNode(0)->nodeValue;
if ($normalizeWhitespace) {
return trim(preg_replace('/(?:\s{2,}+|[^\S ])/', ' ', $text));
}
return $text;
}

Answer 1

This exception is thrown when trying to access the text of an empty node list. I have written a util class for this purpose, as I don't always mind the value being empty. Simply pass the node list you want to get the inner text from, like so CrawlUtil::innerText($nodeList). Hope it will help somebody in the future :)
use Symfony\Component\DomCrawler\Crawler;
class CrawlUtil
{
/**
* Suppresses exception that node list is empty.
*
* #param Crawler $crawler
*
* #return string|null
*/
public static function innerText(Crawler $crawler): ?string
{
if ($crawler->count() > 0 && $crawler->text() !== '') {
return $crawler->innerText();
}
return null;
}
}