Character-wise string diff in PHP

Question

In short I am looking for something like google-diff-match-patch in PHP.

I have had a look at some similar questions at SO, and also at the algorithm provided here, but all of them fail:

diff("draßen", "da draußen")

should not give

<del>draßen</del> <ins>da draußen</ins>

(which is kind of stupid for my purpose, because I want to compare file names), but (try here)

<ins>da </ins>dra<ins>u</ins>ßen

Is there a code snippet in PHP that does this? Unfortunately, I cannot use (i.e. install) external packages.

Not sure this is what you want / need, but give this PHP function a look: php.net/manual/en/function.similar-text.php. There's also the levenshtein algorithm there, at "See also". — Francisc
– Francisc, Commented Jul 22, 2010 at 9:30
You could define a threshhold percentage for when the check 'in-word' diffs with similar_text(). Haven't got the time to work out an example a.t.m. though. — Wrikken
– Wrikken, Commented Jul 22, 2010 at 9:36
In the API Documentation on the Google Code page you link to there is mention of a partial PHP implementation - although this is not part of the repository as yet. — MrWhite
– MrWhite, Commented Jul 22, 2010 at 10:25
@Francisc: No, it's not -- but in fact I'm using right this function to select filenames similar to the one given. Now I want to highlight the differences... — fuenfundachtzig
– fuenfundachtzig, Commented Jul 22, 2010 at 16:04

R. Hill · Accepted Answer · 2011-02-26 23:12:43Z

4

https://github.com/gorhill/PHP-FineDiff supports character-wise diff and can render the differences in HTML

answered Feb 26, 2011 at 23:12

R. Hill

3,6201 gold badge22 silver badges18 bronze badges

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

Comments

Benjamin Cremer · Accepted Answer · 2010-07-22 13:47:55Z

2

The PEAR Package Text_Diff provides Inline-Diffs.

edited Jul 22, 2010 at 13:47

answered Jul 22, 2010 at 13:42

Benjamin Cremer

4,8221 gold badge26 silver badges30 bronze badges

2 Comments

fuenfundachtzig Over a year ago

I know. But I cannot install pear packages afaik.

Benjamin Cremer Over a year ago

You can download the Text_Diff Package as tgz. So you could extract the functions/algorithms you actually need.

Ali Gangji · Accepted Answer · 2012-01-30 08:24:45Z

2

There is a php version of google-diff-match-patch available here: https://github.com/nuxodin/diff_match_patch-php

answered Jan 30, 2012 at 8:24

Ali Gangji

1,51113 silver badges22 bronze badges

Comments

user2409582 · Accepted Answer · 2013-05-22 12:56:33Z

2

There is a port of fresh version google-diff-match-patch library. It is much faster than previous and have no problems wth utf8.

answered May 22, 2013 at 12:56

user2409582

212 bronze badges

Collectives™ on Stack Overflow

Character-wise string diff in PHP

4 Answers 4

Comments

2 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related