PHP：获取HTML网页的所有CSS文件 [英] PHP: Get all CSS files of an HTML web page

问题描述

我正在尝试从URL获取html文件的所有 CSS 文件。

I'm trying to get all CSS files of an html file from URL.

我知道，如果我想获取 HTML 代码很容易-只需使用PHP函数- file_get_contents 。

I know that if I want to get the HTML code it is easy - just using PHP function - file_get_contents.

问题是-如果我可以轻松地在 HTML 的URL中搜索并从中获取所有相关的 CSS 文件的文件或内容？

The question is - if I could search easily inside an a URL of HTML and get from there the files or content of all related CSS files?

注意-我想构建一个用于获取大量CSS文件的引擎，这就是为什么仅阅读源代码是不够的。 p>

Note - I want to build an engine for getting a lot of CSS files, this is why just reading the source is not enough..

谢谢

推荐答案

尝试使用 http://simplehtmldom.sourceforge.net/ 进行HTML解析。

You could try using http://simplehtmldom.sourceforge.net/ for HTML parsing.

require_once 'SimpleHtmlDom/simple_html_dom.php';

$url = 'www.website-to-scan.com';
$website = file_get_html($url);

// You might need to tweak the selector based on the website you are scanning
// Example: some websites don't set the rel attribute
// others might use less instead of css
//
// Some other options:
// link[href] - Any link with a href attribute (might get favicons and other resources but should catch all the css files)
// link[href="*.css*"] - Might miss files that aren't .css extension but return valid css (e.g.: .less, .php, etc)
// link[type="text/css"] - Might miss stylesheets without this attribute set
foreach ($website->find('link[rel="stylesheet"]') as $stylesheet)
{
    $stylesheet_url = $stylesheet->href;

    // Do something with the URL
}

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