Code Modernization: Explicitly declare all properties in Text_Diff_Engine_native.
Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0.
There are a number of ways to mitigate this:
- If it is an accidental typo for a declared property: fix the typo.
- For known properties: declare them on the class.
- For unknown properties: add the magic
__get(), __set(), et al. methods to the class or let the class extend stdClass which has highly optimized versions of these magic methods built in.
- For unknown use of dynamic properties, the
#[AllowDynamicProperties] attribute can be added to the class. The attribute will automatically be inherited by child classes.
In this case, the properties, as used in the class methods, fall in the “known property” category.
Reference: PHP RFC: Deprecate dynamic properties.
Follow-up to [53942], [53948], [53949], [53952], [53953], [53954], [53957], [54037].
Props jrf, thomask.
See #58298.