Docs

How to find elements without specific attributes in DOM Crawler?

You have two options to find elements without specific attributes in DOM Crawler . The first option uses the filterXPath method with an XPath selector that includes a negative predicate. And the second option uses the filter method with the :not CSS pseudo-class and the attribute selector.

Here is some sample code that showcases the filterXPath options and finds all img tags that do not have an alt attribute:

use Symfony\Component\DomCrawler\Crawler;

$html = <<<EOD
<!DOCTYPE html>
<html>
<head>
	<title>Example Page</title>
</head>
<body>
	<h1>Hello, world!</h1>
	<p>This is an example page.</p>
	<img src="logo.png" />
  <img src="header.png" alt="header"/>
  <img src="yasoob.png" alt="profile picture"/>
</body>
</html>
EOD;

// Load the HTML document
$crawler = new Crawler($html);

// Find all img elements without an alt attribute
$imagesWithoutAlt = $crawler->filterXPath('//img[not(@alt)]');

// Loop over the images and print their src attributes
foreach ($imagesWithoutAlt as $image) {
    echo $image->getAttribute('src') . PHP_EOL;
}

// Output:
// logo.png

Here is some sample code that uses the filter method with :not CSS pseudo-class instead:

use Symfony\Component\DomCrawler\Crawler;

$html = <<<EOD
<!DOCTYPE html>
<html>
<head>
	<title>Example Page</title>
</head>
<body>
	<h1>Hello, world!</h1>
	<p>This is an example page.</p>
	<img src="logo.png" />
  <img src="header.png" alt="header"/>
  <img src="yasoob.png" alt="profile picture"/>
</body>
</html>
EOD;

// Load the HTML document
$crawler = new Crawler($html);

// Find all img elements without an alt attribute
$imagesWithoutAlt = $crawler->filter('img:not([alt])');

// Loop over the images and print their src attributes
foreach ($imagesWithoutAlt as $image) {
    echo $image->getAttribute('src') . PHP_EOL;
}

// Output:
// logo.png

Related DOM Crawler web scraping questions: