# Migrating from PHP 8.3.x to PHP 8.4.x

## Table of Contents

- New Features
- New Classes, Enums, and Interfaces
- New Functions
- New Global Constants
- Backward Incompatible Changes
- Deprecated Features
- Removed Extensions
- Other Changes
- Windows Support

This new minor version brings with it a number of new features and a few incompatibilities that should be tested for before switching PHP versions in production environments.

See also the migration guides for PHP versions 7.1.x, 7.2.x, 7.3.x, 7.4.x, 8.0.x, 8.1.x, 8.2.x, 8.3.x.

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open