PHP RegEx: Replace all relative paths in HTML-string, with absolute paths - php

Question

I'm working on a project where I need to scrape some content from the same site, but a subfolder, and store it. I know it's not ideal, but it's sadly the best approach for the client.
I need to change all references from relative to absolute URLs
All the references (images, css, js) are referred relatively with both:
"../../imgs/"
"/js/"
... which means they don't work in my sub-folder. I need a function that matches the regex on these references and replaces the path.
When I try this:
function getRelativeContent($url) {
$page = file_get_contents($url);
//url needs trailing /
if (substr($url, -1, 1) != "/")
$url .= "/";
$page = preg_replace('/src="(\/)?([\w_\-\/\.\?&=#%#]*)"/i','src="' . $url . '$2"', $page);
$page = preg_replace('/href="(\/)?([\w_\-\/\.\?&=#%#]*)"/i','href="' . $url . '$2"', $page);
return $page;
}
echo getRelativeContent($url);
Then these URLs doesn't work:
<link href="/cassette.axd/stylesheet/fdbdaa59cb97b35f06f65fd41cb60caa3975cc0f/forbrug-rwd_(max-width 767px)" type="text/css" rel="stylesheet" media="(max-width: 767px)">
<img src="https://www.domain.dk/~/media/2561BD6AFBD64402877E4ACED01F97FD.ashx" />

Answer 1

function getRelativeContent($url) {
$page = file_get_contents($url);
//url needs trailing /
if (substr($url, -1, 1) != "/")
$url .= "/";
$page = preg_replace('/src="(\/)?([\w_\-\/\.\?&=#%#]*)"/i','src="' . $url . '$2"', $page);
$page = preg_replace('/href="(\/)?([\w_\-\/\.\?&=#%#]*)"/i','href="' . $url . '$2"', $page);
return $page;
}
echo getRelativeContent($url);