Summary of common methods for crawling web pages and parsing HTML in PHP, tutorial on php crawling _ PHP

Source: Internet
Author: User
PHP crawls web pages, parses common HTML methods, and captures web pages in php. Summary of common methods for crawling web pages and parsing HTML in PHP. Overview crawling in php is a feature we often encounter when developing programs. PHP has many open-source crawler tools, such as snoopy. this is a summary of common methods used by PHP to Capture webpages and parse HTML.

Overview

Crawlers are a feature we often encounter when developing programs. PHP has many open-source crawler tools, such as snoopy. these open-source crawler tools usually help us complete most of the functions, but in some cases, we need to implement a crawler by ourselves, this article summarizes how PHP implements crawling.

Main methods for implementing crawler in PHP

1. file () function
2. file_get_contents () function
3. fopen ()-> fread ()-> fclose () method
4. curl method
5. fsockopen () function, socket mode
6. use open-source tools, such as snoopy

Main methods for parsing XML or HTML in PHP

1. Regular expression
2. PHP DOMDocument object
3. plug-ins, such as PHP Simple html dom Parser

Summary

Here is a simple summary of PHP crawler implementation methods. there are still a lot of content designed in this article. I will summarize the methods for parsing HTML and XML in PHP later.

Crawler overview crawlers are a feature we often encounter when developing programs. PHP has many open-source crawler tools, such as snoopy...

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.