domcrawlervshtmlparser2
DOMCrawler library is part of the Symfony Components project and provides an easy way to traverse and manipulate HTML and XML documents using the Document Object Model (DOM) in PHP.
DOMcrawler supports both CSS selectors and XPath for HTML document parsing and is one the most popular HTML parsing tools used in web scraping with PHP.
htmlparser2 is a Node.js library for parsing HTML and XML documents. It works by building a tree of elements, similar to the Document Object Model (DOM) in web browsers. This allows you to easily traverse and manipulate the structure of the document.
htmlparser2 is a low-level html tree parser but it can still be useful in web scraping as it's a powerful tool for HTML restructuring and serialization.
Example Use
use Symfony\Component\DomCrawler\Crawler;
$html = '<html><body><h1 class="title">Hello World</h1></body></html>';
$crawler = new Crawler($html);
// Find all elements using CSS selectors
$elements = $crawler->filter('.title')i;
// or XPath
$elements = $crawler->filterXPath('//h1');
// Print the text content of the elements
foreach ($elements as $element) {
echo $element->textContent;
}
const htmlparser = require("htmlparser2");
const parser = new htmlparser.Parser({
onopentag: (name, attribs) => {
console.log(`Opening tag: ${name}`);
},
ontext: (text) => {
console.log(`Text: ${text}`);
},
onclosetag: (name) => {
console.log(`Closing tag: ${name}`);
}
}, {decodeEntities: true});
const html = "<p>Hello, <b>world</b>!</p>";
parser.write(html);
parser.end();