找到页面中的所有href并用链接维护以前的链接替换 ​​- PHP [英] Find all hrefs in page and replace with link maintaining previous link - PHP

问题描述

我正在尝试在网页上找到所有href链接，并用我自己的代理链接替换该链接。

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>

需要

<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();

请在此处查看： http://codepad.org/9enqx3Rv

如果您没有将HTML作为字符串，则可以使用cUrl（ docs ）获取HTML，或者你可以使用 loadHTMLFile 方法 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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