How can remove some portion of string between two character if exist

Thanks, @sr57 for replying to me can you give me an example like this How can remove this ?first_name=berro&last_name=sin from all if exists

:-)

 $url=preg_replace('/\?first_name=[^\&]*\&last_name=[^\&]*/', '', $url);

I did not test, you should be able to do to fine tuning, if not ask

Explanation :

\ to escape special character, so to be double in php, but does not show on the code above

[^&] : all char except &

Ok Brother Thanks.. One more how can put if condition in this if exists then replace otherwise, will original URL

No need, $url will be unchanged if no replacement made.

All is here https://regexr.com/ (it could take a while to learn every possibilities)

Brother, you did not understand my problem I have two special characters ?first_name=berro&last_name=sin? in which want to delete if the value will give in this ? specific character then remove otherwise not The values will give dynamically

Your question "How can remove some portion ..."

No s at portion :-)

So it's an other question, so close this one and open a new one ... or just call in a row my example with your 2 filters.

Thanks, @sr57 for advising me.. Can you put the answer here

Brother, you can check my question that I want to remove some portion of the string between two special characters if exist

Yes, your have everything with my answer, but you don't understand, I suggest you to reread my previous anwer to try on different examples.

Thanks, @jlrdw for replying to me... I want to remove some portion of the string between these special characters ? asdfasdf ? Values will give different every time between these special characters

If will give then remove otherwise not