# Migrating from PHP 7.3.x to PHP 7.4.x

## Table of Contents

- New Features
- New Classes 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 7.0.x, 7.1.x, 7.2.x and 7.3.x.