String replace with multiple occurrences

Question

I have the following string

Re: Re: Re: Re: Re: Re: Re: Re:

What I want is the end result of mutating this string is:

Re:

So what I am looking for is a way to detect multiple Re: (with a space in between) and change it to just one Re:.

If I had any idea how to accomplish this I'd post some code but no real clue how to do this in php

ishegg · Accepted Answer · 2017-08-23 19:50:55Z

8

You can use this regex:

<?php
$s = "Re: Re: Re: Re: Re: Re: Re: Re: Prueba";
$s = preg_replace("/(Re: ?){2,}/i", "Re: ", $s);
var_dump($s); // Re: Prueba

Explanation:

(Re: ?) is just Re: and an optional space between them.
{2,}    means 2 or more times (if it's just one, why replace it)
i       so it's case insensitive

Demo

edited Aug 23, 2017 at 19:50

answered Aug 23, 2017 at 19:35

ishegg

9,9973 gold badges20 silver badges31 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

String replace with multiple occurrences

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related