Highlight the difference between two strings in PHP

Question

What is the easiest way to highlight the difference between two strings in PHP?

I\'m thinking along the lines of the Stack Overflow edit history page, where new text

Answer 1

I would recommend looking at these awesome functions from PHP core:

similar_text — Calculate the similarity between two strings

http://www.php.net/manual/en/function.similar-text.php

levenshtein — Calculate Levenshtein distance between two strings

http://www.php.net/manual/en/function.levenshtein.php

soundex — Calculate the soundex key of a string

http://www.php.net/manual/en/function.soundex.php

metaphone — Calculate the metaphone key of a string

http://www.php.net/manual/en/function.metaphone.php