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The main content of this article is to explain "what are the methods of PHP crawling web content". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "what are the methods of PHP crawling web content?"

This article operating environment: windows10 system, php 7.1, thinkpad T480 computer.

When we do the development work, we usually need to grab some web page files, usually we use PHP to simulate browser access, access the url address through http requests, and then get html source code or xml data. However, after we get the data, we can't output it directly. We often need to extract the content and then format it to show the data in a more friendly way.

Let's briefly talk about several methods and principles of php crawling pages:

1. The main methods for PHP to crawl pages:

1. File () function

2. File_get_contents () function

3. Fopen ()-> fread ()-> fclose () mode

4.curl mode

5. Fsockopen () function socket mode

Second, PHP parses html or xml code in main ways:

1. File () function

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