Migrating from PHP 7.2.x to PHP 7.3.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.

Siehe auch die Migrationsleitfäden für PHP-Versionen 5.0.x, 5.1.x, 5.2.x, 5.3.x, 5.4.x, 5.5.x, 5.6.x, 7.0.x, 7.1.x and 7.2.x.