http://www.google.com.hk/ Implementation code for parsing html using php

Recently I want to use PHP to write a crawler, which requires parsing HTML. I found a project called PHP Simple HTML DOM Parser on sourceforge. It can return specified DOM elements through a CSS selector in a jQuery-like way. It is very powerful.
First introduce the simple_html_dom.php file at the beginning of the program

Copy the code The code is as follows:

include_once('simple_html_dom.php');

Copy the code The code is as follows:

// Create a DOM object from a string
$html = str_get_html('Hello!< /html>');
// Create a DOM object from a URL
$html = file_get_html('http://www.google.com/');
// Create a DOM object from a HTML file
$html = file_get_html('test.htm');

Copy the code The code is as follows:

// Find all anchors, returns an array of element objects
$ret = $html->find('a');
// Find (N)th anchor, returns element object or null if not found (zero based)
$ret = $html->find(' a', 0);
// Find lastest anchor, returns element object or null if not found (zero based)
$ret = $html->find('a', -1);
// Find all < ;div> with the id attribute
$ret = $html->find('div[id]');
// Find all