What does wikipedia use for text and revision diffs

Posted by tictac on Stack Overflow See other posts from Stack Overflow or by tictac
Published on 2010-05-23T21:24:30Z Indexed on 2010/05/23 21:30 UTC
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php

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string

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text

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diff

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compare

I'm trying to take 2 versions of text (10 pages long) and compare the 2 to produce the difference. I know Wikipedia has a similar feature to compare revisions. Does anyone know what they use? I'm hoping they're using a php-driven solution.

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