通过str_replace仅在特定子目录中删除“？”

Question

The function below is replacing and & and ? characters but for ? i want the replace works only when in subdirectory example.com/forum/

public static function clean($sUrl)
    {
        return str_replace([' ', '&', '?'], ['%20', '&', ''], $sUrl);
    }

example:

https://example.com/forum/post/work/22/what-are-requirements-to-get-a-work-permit?/24

to

https://example.com/forum/post/work/22/what-are-requirements-to-get-a-work-permit/24

Here's the code that is making the forum URL:

<a href="{{ $design->url('forum', 'forum', 'post', "$topic->name,$topic->forumId,$topic->title,$topic->topicId") }}">

Answer 1

You need to match the URL string to check if forum subdirectory is present in the URL using preg_match(). Later, you can use str_replace() to remove ? from your URL.

<?php 

function removeQuestionMarks($URL){
    if(preg_match('/^http(s)?:\/\/example\.com\/forum\/.*$/',$URL) === 1){
        $URL = trim($URL);
        $URL = str_replace("?","",$URL);
    }

    return str_replace([' ', '&'],['%20', '&amp;'],$URL);
}

echo removeQuestionMarks('https://example.com/forum/post/work/22/what-are-requirements-to-get-a-work-permit?/24'),PHP_EOL;

echo removeQuestionMarks('https://example.com/forum/ why? is it difficult?/877');

Demo: https://3v4l.org/FXDml

Note that I haven't used urlencode() as it would convert other characters in the URL too which is not desired in your case.