Research Documentation 05-php-8.2
Allow True/False and Null to be stand-alone data types
Instead of true and false having the bool data type, they are now allowed to have their own data types of true and false respectively. The same applies to null.
Readonly Classes
Creating a class that is readonly will prevent the creation of dynamic properties. Any attempt to allow dynamic properties will cause a compile-time error.
mysqli_execute_query Function
A new PHP function that prepares and executes a SQL statement against a database.
Summary
PHP comes out with a new version every single year. These are just a few of the new features that came with PHP 8.2, which will be actively supported until December 8, 2024.