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Table of Contents
Setup
Documentation
Practical Application: Scraping Envato Tuts
Data Extraction
Handling Pagination
Conclusion
Home Backend Development PHP Tutorial HTML Parsing and Screen Scraping With the Simple HTML DOM Library

HTML Parsing and Screen Scraping With the Simple HTML DOM Library

Feb 28, 2025 am 10:50 AM

This tutorial demonstrates how to efficiently parse HTML using an open-source parser, avoiding the complexities of regular expressions. We'll scrape Envato Tuts as an example, extracting article titles and descriptions. This is for illustrative purposes; remember to always obtain permission before scraping a website.


  1. Setup

Begin by installing Composer, a PHP package manager, to simplify library installation.

HTML Parsing and Screen Scraping With the Simple HTML DOM Library

Further steps are detailed below.

Documentation

Comprehensive documentation is available on the project's official GitHub repository.

HTML Parsing and Screen Scraping With the Simple HTML DOM Library ---

  1. Practical Application: Scraping Envato Tuts

Let's create a script to extract article titles and descriptions from Envato Tuts . This is a demonstration and should not be performed without permission. Scraping can overload servers.

HTML Parsing and Screen Scraping With the Simple HTML DOM Library

The core code snippet:

use voku\helper\HtmlDomParser;
require_once 'vendor/autoload.php';

$articles = [];
getArticles('https://code.tutsplus.com/tutorials');

This includes the necessary library and initializes an array to store article data. The getArticles function (defined later) fetches and processes the webpage.


  1. Data Extraction

The heart of the script extracts article information:

$items = $html->find('article');
foreach($items as $post) {
    $articles[] = [
        /* title */ $post->findOne(".posts__post-title")->firstChild()->text(),
        /* description */ $post->findOne("posts__post-teaser")->text()
    ];
}

This iterates through each article element (<article>) and extracts the title and description using CSS selectors. Each $articles entry will contain a title and description pair. For example:

$articles[0][0] = "My Article Name Here";
$articles[0][1] = "This is my article description";

  1. Handling Pagination

To handle multiple pages, we identify the "next" page link:

HTML Parsing and Screen Scraping With the Simple HTML DOM Library HTML Parsing and Screen Scraping With the Simple HTML DOM Library HTML Parsing and Screen Scraping With the Simple HTML DOM Library

The relevant HTML:

<a aria-label="next" class="pagination__button pagination__next-button" href="http://miracleart.cn/link/a3cdf7cabc49ea4612b126ae2a30ecbf" rel="next"><i class="fa fa-angle-right"></i></a>

The script finds this link, extracts the href attribute, and recursively calls getArticles() for subsequent pages. Crucially, the $html object is cleared to prevent memory exhaustion.


Conclusion

Parsing large websites can be time-consuming. This tutorial provides a foundation for HTML parsing using a user-friendly library. While this library is convenient, remember that other methods, such as PHP's built-in DOM manipulation with XPath, exist. Always prioritize obtaining permission before scraping any website.

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