You can find HTML elements by class with DOM Crawler by making use of the filter method with a [CSS selector](CSS selectors) that includes the class name. Here is some sample code that uses Guzzle to load ScrapingBee's homepage and then uses the filter method to extract the tag with the class of mb-33:
use Symfony\Component\DomCrawler\Crawler;
use GuzzleHttp\Client;
// Create a client to make the HTTP request
$client = new \GuzzleHttp\Client();
$response = $client->get('https://scrapingbee.com/');
$html = (string) $response->getBody();
// Load the HTML document
$crawler = new Crawler($html);
// Find all elements with the class "mb-33"
$h1Tag = $crawler->filter('.mb-33');
// Loop over the elements and print their text content
foreach ($h1Tag as $element) {
echo $element->textContent . PHP_EOL;
}
// Output:
// Tired of getting blocked while scraping the web?
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Note: This example uses Guzzle so you may have to install it.