Whether you are looking to obtain data from a website, track changes on the internet, or use a website API, website crawlers are a great way to get the data you need.
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While they have many components, crawlers fundamentally use a simple process: download the raw data, process and extract it, and, if desired, store the data in a file or database. There are many ways to do this, and many languages you can build your spider or crawler in.
If you’re just getting started, use this tutorial on simply downloading webpages using PHP.
Looking for some quick code to make your development life a bit easier? Try this article on PHP web crawler development techniques we use here at Potent Pages.
PHP Web Crawler Tutorials
Downloading a Webpage Using PHP and cURLHow to Download a Webpage using PHP and cURL
Looking to automatically download webpages? Here’s how to download a page using PHP and cURL.
Quick PHP Web Crawler Techniques
Looking to have your web crawler do something specific? Try this page. We have some code that we regularly use for PHP web crawler development, including extracting images, links, and JSON from HTML documents.
Creating a Simple PHP Web CrawlerHow to create a simple PHP web crawler to download a website
Looking to download a site or multiple webpages? Interested in examining all of the titles and descriptions for a site? We created a quick tutorial on building a script to do this in PHP. Learn how to download webpages and follow links to download an entire website.
Creating a Polite PHP Web Crawler: Checking robots.txtHow to create a polite PHP web crawler using robot.txt.
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In this tutorial, we create a PHP website spider that uses the robots.txt file to know which pages we’re allowed to download. We continue from our previous tutorials to create a robust web spider and expand on it to check for download crawling permissions.
Getting Blocked? Use a Free Proxy
If you’re tired of getting blocked when using your web crawlers, we recommend using a free proxy. In this article, we go over what proxies are, how to use them, and where to find free ones.
Other PHP Web Crawler Tutorials from Around the Web
How To Create A Simple Web Crawler in PHP
This tutorial covers how to create a simple web crawler using PHP to download and extract from HTML. It was written by Subin Siby. This also includes a demo about the process and uses the Simple HTML DOM class for easier page processing.
How To Build A Basic Web Crawler To Pull Information From A Website (Part 1)
This is a tutorial written by James Bruce on how to build a basic web crawler in order to pull information from a website using HTML and PHP languages. This includes code on how to extract all of the links from a given webpage.
How to Create a Web Spy with a PHP Crawler
This is a tutorial made by 1st Web Designer on how to create a web crawler in PHP in 5 steps. The tutorial explains how to create a MySQL database, how to obtain data, and how to save it.
PHPCrawl webcrawler library for PHP – Example script
This is a tutorial published on the PHPCrawl website about building a crawler in PHP using the PHPCrawl library. This provides a brief explanation and a sample script to demonstrate how to implement the library.
PHP Tutorial: Making a webcrawler
This is a PHP tutorial made by Tim van Osch about building a web crawler using PHP. This include codes in setting up a web server with the required MySQL database, and how to use the base PHP file to build a functional crawler.