Migrating from PHP 8.0.x to PHP 8.1.x

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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.

Véanse también las guías de migración para versiones de PHP 7.1.x, 7.2.x, 7.3.x, 7.4.x, 8.0.x.