No More Dynamic Properties in PHP 9. The Language is Evolving.

PHP 8.2 is just around the corner and it will deprecate dynamic properties, to remove them in PHP 9.

The new PHP version 8.2, to be released later this month, will finally deprecate the creation of dynamic properties in classes.

The following code will fail in PHP 9. In version 8.2 it will still work but will raise a deprecation warning:

It’s possible to test this behavior already:

Programmers in love with magic can sleep well — the stdClass and classes implementing magical __get and __set methods are unaffected!