How to highlight changes/difference in one text paragraph from the other?

Question

Is it possible to highlight the modifications in one text paragraph from the other?

For example, there are 3 text fields in a database. Non-admin users can edit the text

Answer 1

If you are familiar with GNU/Linux tools, you might be familiar with the `diff' tool.

And someone has written a fully functional diff for comparing files/strings in php.

You can find it here: php diff example.