Highlighting Text Differences in PHP

Identifying and visually representing the differences between two strings is a common task in various programming applications, such as web development and text processing. In PHP, there are several approaches to effectively highlight these differences.

One popular method is the FineDiff class, which provides a convenient way to generate HTML markup that displays new text in green and removed text in red, similar to Stack Overflow's edit history page. Here's how to use it:

// Import the FineDiff class
require_once 'FineDiff.php';

// Create a new FineDiff instance
$diff = new FineDiff($originalString, $modifiedString);

// Generate HTML representation of the diff
$html = $diff->render();

// Output the HTML
echo $html;

The FineDiff class offers a powerful and flexible solution for highlighting text differences. It can be used to render HTML diffs, generate context diffs, and compute the minimum number of edits required to transform one string into another.