How to remove all links from a string that does not have an absolute link?-CodePudding

I have a string that contains text and some links. I want to remove all the links that do not have absolute links but keep their text.

I want to do it with regex instead of loading the dom.

Is that possible?

I have tried this regex

preg_replace('#href=["\']([^/][^\':"]*)["\']#', $root_path.'$1', $html);

But this will replace the href with an empty string only.

And I want to completely remove the anchor tags and keep its text only.

CodePudding user response：

You can try using preg_replace_callback for this.

Here is an example to do that way

$string = "This is a test string with a non-absolute link: 
www.example.com and an absolute link: https://www.example.com";

$string = preg_replace_callback("/(?!http(s?):\/\/)(www\.[\S] )/i",
 function($matches) {
    return $matches[0];
 }, $string);

echo $string;

Hope it helped you.

CodePudding user response：

You can use this regex, but take it with a pinch of salt! It's far from perfect, so try it for your use case and if anything goes wrong, just write in the comment and I'll try to fix the regex for you!

<?php

$re = '/<a(\s [\w-] ?(=([\'"].*?[\'"])|([\w\d] ?))?)*\s href=[\'"](?!https?:\/\/)(?<link>[^\'"] ?)[\'"](\s [\w-] ?(=([\'"].*?[\'"])|([\w\d] ?))?)*>(?<text>. ?)<\/a>/m';
$str = '<a  href="/example" data-enabled>Hello</a> <a href="https://www.example.com">world!</a>';

$string = '<a href="/example">Hello</a> <a href="https://www.example.com">world!</a>';

$out = preg_replace_callback($re,
 function($matches) {
    return $matches['text'];
 }, $string);
 
var_dump($out);

CodePudding user response：

You can simplify your regex

$text = "Lorem <a href='#'>text</a>
Lorem2 <a href='#'>text2</a>";
$text = preg_replace_callback('/<a .*>(.*)<\/a>/mi', function($matches) {
    return $matches[1];
}, $text);

var_dump($text);

Output will be like that

string(24) "Lorem text
Lorem2 text2"

Run in sandbox:

https://onlinephp.io/c/3bda8