Installation

phil/text-diff

Requirements

Requirement	Why
PHP 8.5 or later	Readonly classes, typed constants, `array_all()`
`ext-mbstring`	Offsets of changes counted in code points
`phil/ujo`	The documents compared block by block, and their rendering

Installing

composer require phil/text-diff

It is a library, not a bundle: there is nothing to register. Build a TextDiff where differences are shown, once, and keep it; it holds no state between two comparisons.

use Phil\TextDiff\TextDiff;

$differ = new TextDiff();          // at most 1000 edits searched for
$strict = new TextDiff(maxEdits: 200);

In a Symfony application, phil/text-diff-bundle registers it as a service, with the text_diff and text_diff_document Twig filters and a Stimulus controller that steps through the changes. Without the bundle, declare it as a service if several classes use it:

services:
    Phil\TextDiff\TextDiff: ~