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.
参见 PHP 版本迁移指南 7.1.x, 7.2.x, 7.3.x, 7.4.x, 8.0.x, 8.1.x, 8.2.x, 8.3.x, 8.4.x, 8.5.x.