Remove www from string without affecting other parts of string

Question

I have a requirement to replace all Url prefixes from the string

Example Inputs

1)lorum ipsum www.goal.com

2)lorum ipsum http://www.goal.com

3)lorum ipsum https://www.goal.com

4)lorum ipsum https://www.goal.com/1234

5)lorum ipsum www.

Expected o/p

1)lorum ipsum goal.com

2)lorum ipsum goal.com

3)lorum ipsum goal.com

4)lorum ipsum goal.com/1234

5)lorum ipsum www.

So far i have this

function removeLinks($url) {

      //$url=preg_replace ("~^www\.~", "", $url);
      $disallowed = array('http://', 'https://','www.');
      foreach($disallowed as $d) {
            $url=str_replace($d, '', $url);

            
      }
      return $url;
   }

echo removeLinks('lorum ipsum http://www.goal.com and https://www.goal.com abd https://www.goal.com/4234234 and www.goal.com and not remove www.');

But this also remove www at the end which I don't want to be removed,any possible workaround to fix the problem

Does this answer your question? [Remove URL Prefix from String (http:/, www, etc.)](https://stackoverflow.com/questions/16673628/remove-url-prefix-from-string-http-www-etc) — anotherGatsby, Mar 27 '22 at 08:36
You can simplify the selected answer on that question to meet your need. Anyways I have posted the simplified version. Check if it works. — anotherGatsby, Mar 27 '22 at 09:28
Please describe why `www.` should not be removed in case 5. Is it because it is followed by the end of the string? Is it because it is not followed by at least one non-space character? You need to give the exact criteria for removal. Examples alone do not cut it. — MikeM, Mar 27 '22 at 09:53
Testing for a valid url requires a very long and complicated regex. What is your criteria for determining whether `www.` is part of an url? — MikeM, Mar 27 '22 at 10:07
So you only want to remove `www.` if it is part of an url with a valid top-level domain? Again, you have to decide how you want to determine that `www.` is part of an url. See [What is a good regular expression to match a URL?](https://stackoverflow.com/questions/3809401/what-is-a-good-regular-expression-to-match-a-url) for example. Until you make the choice of how strict you want to be in determining an url, it is difficult to give a proper regex solution here. — MikeM, Mar 27 '22 at 11:21

anotherGatsby · Answer 1 · 2022-03-27T09:35:38.833

0

Try this: (http[s]?:\/\/)?www\.(?=.+)

Test regex here: https://regex101.com/r/fjScQn/2

edited Mar 27 '22 at 09:35

answered Mar 27 '22 at 09:00

anotherGatsby

1,568
10
21

score 0 · Answer 2 · answered Mar 27 '22 at 10:31

0

function getCleanURL($url) {
    $pattern = '#^(http(s)?://)?w{3}.#';
    if($url == 'www.') {
        return $url;
    }
    return preg_replace($pattern, '', $url);
}


echo getCleanURL('www.goal.com'); // goal.com
echo getCleanURL('http://www.goal.com'); // goal.com
echo getCleanURL('https://www.goal.com'); // goal.com
echo getCleanURL('https://www.goal.com/1234'); // goal.com
echo getCleanURL('www.'); // www.

answered Mar 27 '22 at 10:31

Biswajit Biswas

859
9
20

`echo getCleanURL('wwwicked!'); // cked!` – MikeM Mar 27 '22 at 14:34

Remove www from string without affecting other parts of string

2 Answers2