查找页面中的所有 hrefs 并替换为保持上一个链接的链接 - PHP

Find all hrefs in page and replace with link maintaining previous link - PHP(查找页面中的所有 hrefs 并替换为保持上一个链接的链接 - PHP)

问题描述

我正在尝试查找网页上的所有 href 链接，并将该链接替换为我自己的代理链接.

I'm trying to find all href links on a webpage and replace the link with my own proxy link.

例如

<a href="http://www.google.com">Google</a>

必须

<a href="http://www.example.com/?loadpage=http://www.google.com">Google</a>

推荐答案

使用PHP的DomDocument解析页面

$doc = new DOMDocument();

// load the string into the DOM (this is your page's HTML), see below for more info
$doc->loadHTML('<a href="http://www.google.com">Google</a>');

//Loop through each <a> tag in the dom and change the href property
foreach($doc->getElementsByTagName('a') as $anchor) {
    $link = $anchor->getAttribute('href');
    $link = 'http://www.example.com/?loadpage='.urlencode($link);
    $anchor->setAttribute('href', $link);
}
echo $doc->saveHTML();

在这里查看:http://codepad.org/9enqx3Rv

如果您没有将 HTML 作为字符串，您可以使用 cUrl (docs) 来抓取 HTML，也可以使用 DomDocument

If you don't have the HTML as a string, you may use cUrl (docs) to grab the HTML, or you can use the loadHTMLFile method of DomDocument

文档

• DomDocument - http://php.net/manual/en/class.domdocument.php
• DomElement - http://www.php.net/manual/en/class.domelement.php
• DomElement::getAttribute - http://www.php.net/manual/en/domelement.getattribute.php
• DOMElement::setAttribute - http://www.php.net/manual/en/domelement.setattribute.php
• urlencode - http://php.net/manual/en/function.urlencode.php
• DomDocument::loadHTMLFile - http://www.php.net/manual/en/domdocument.loadhtmlfile.php
• cURL - http://php.net/manual/en/book.curl.php

• DomDocument - http://php.net/manual/en/class.domdocument.php
• DomElement - http://www.php.net/manual/en/class.domelement.php
• DomElement::getAttribute - http://www.php.net/manual/en/domelement.getattribute.php
• DOMElement::setAttribute - http://www.php.net/manual/en/domelement.setattribute.php
• urlencode - http://php.net/manual/en/function.urlencode.php
• DomDocument::loadHTMLFile - http://www.php.net/manual/en/domdocument.loadhtmlfile.php
• cURL - http://php.net/manual/en/book.curl.php

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