Web Scraping for PHP developers


This book is no longer available for sale.

Web Scraping for PHP developers

a practical guide

About the Book

This book is a practical, pragmatic and lightweight guide to web scraping for PHP developers.Web Scraping - getting a program to capture information from online sources - is one of the most powerful techniques for grabbing content without a browser.

Web Scraping for PHP developers introduces you to a range of scraping techniques using PHP to retrieve online content. You’ll be scraping within 10 minutes of reading the first few chapters. You will also learn methods to scrape authenticated content that requires login or sessions. Also, you will learn to submit and parse Ajax data streams, which would normally be not possible with simple scraping programs.

About the Author

sameer borate
sameer borate

Sameer Borate lives in Pune, India and works as an independent consultant, specialising in web development.

Websites: http://www.codediesel.com

Table of Contents

  • 1. Understanding Web Scraping
    • 1.1 Web Scraping Defined
    • 1.2 Reasons to scrape
    • 1.3 Legality of Web Scraping
    • 2.1 HTTP Overview
      • 2.1.1 GET Requests
      • 2.1.2 Query Strings
      • 2.1.3 POST Requests
      • 2.1.4 URL Syntax
      • 2.1.5 HTTP State Management and Cookies
  • 3. Scraping Toolbox
    • 3.1 Your Scraping Toolbox
      • 3.1.1 PHP cURL:
      • 3.1.2 SimpleHTMLDOM: A quick overview
      • 3.1.3 Caching downloaded pages
      • 3.1.4 Debugging cURL
  • 4. Exploring SimpleHTMLDOM
    • 4.1 Simplehtmldom in detail
      • 4.1.1 Building the initial DOM
      • 4.1.2 Grabbing the text content of a page
      • 4.1.3 Finding elements on a page
      • 4.1.4 Iterating over nested elements
      • 4.1.5 Scraping HTML tables
      • 4.1.6 DOM Parents and Children
      • 4.1.7 Chaining methods
      • 4.1.8 Downloading Images
      • 4.1.9 WGET
  • 5. Scraping Authenticated Pages
    • 5.1 Authenticated sites
      • 5.1.1 HTTP Basic Authentication
      • 5.1.2 HTTP Basic Authentication with cURL
      • 5.1.3 Storing and sending cookies
      • 5.1.4 Session Authentication
      • 5.1.5 Logging to a WordPress Admin site with curl
  • 6. Scraping with Regular Expressions
    • 6.1 Regular Expressions: A quick Introduction
      • 6.1.1 Getting the character encoding for a web page
      • 6.1.2 Grabbing images from a web page
  • 7. Scraping Ajax Content
    • 7.1 JavaScript and the rise of Ajax
      • 7.1.1 FireBug to the rescue
    • 7.2 PhantomJS
  • 8. Using Proxies
    • 8.1 Using proxies for scraping
      • 8.2 Proxies with cURL
  • 9. Scheduling your Scrapers
    • 9.1 Running your scraping at regular intervals
    • 9.2 Ensuring that the CRON job is active
  • 10. Cookbook
    • 10.1 Get character encoding for a web page
    • 10.2 Grabbing website favicons
    • 10.3 Scrape Google search results
    • 10.4 Get Alexa global site rank
    • 10.5 Scraping a page with HTTP authentication
    • 10.6 Logging to WordPress admin and grabbing content
    • 10.7 Getting all the image urls from a page
    • 10.8 Saving all the images from a page to a directory
  • 11. cURL Options
    • A.1 A simple CURL session
      • A.1.1 Setting CURL Options
  • 12. HTTP Status Codes

Other books by this author

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

Now, this is technically risky for us, since you'll have the book or course files either way. But we're so confident in our products and services, and in our authors and readers, that we're happy to offer a full money back guarantee for everything we sell.

You can only find out how good something is by trying it, and because of our 100% money back guarantee there's literally no risk to do so!

So, there's no reason not to click the Add to Cart button, is there?

See full terms...

80% Royalties. Earn $16 on a $20 book.

We pay 80% royalties. That's not a typo: you earn $16 on a $20 sale. If we sell 5000 non-refunded copies of your book or course for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earnedover $13 millionwriting, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub