The checks work on all levels: properties, arguments, and return values. With natively declared union types, PhpStorm can analyze calls and detect problem areas. If a union type is provided via PHPDoc, PhpStorm offers a quick-fix Alt+Enter for converting it to a native union type. All existing PhpStorm coding assistance features fully support union types. and can be used in all places where regular types are accepted. Union types are specified as Type1|Type2|. Union typesĪ Union Type accepts values of multiple different types rather than a single one. To use them in your project, add a jetbrains/phpstorm-attributes Composer dependency as described in Install Composer dependencies. PhpStorm provides custom open-source PHP 8 attributes. The Non-repeatable attribute inspection highlights attributes that are repeated without the Attribute::IS_REPEATABLE flag set in its arguments declaration. The Non-applicable attribute target declaration inspection verifies that the attribute is annotated with # in its arguments declaration, and is therefore applied to the correct target such as a class or a method,

The Class cannot be used as attribute inspection verifies that a class is annotated with # in its arguments declaration. Several code inspections help to ensure that attributes are used correctly: To use code completion, press Control+Space. Inside the attribute, optionally provide the target and repeatability flags. To create an attribute, add the # marker on top of a class declaration. Unlike PHPDoc comments, attributes are supported and validated on the language level. With attributes, you can provide structured, syntactic metadata to declarations of classes, properties, functions, and so on. If there are arguments in the list whose passed value matches the default value, PhpStorm highlights them as unused and provides a quick-fix to delete them.

In a function call, you can use the provided quick-fix Alt+Enter to add parameter names either one by one or to all arguments at once. This way, function calls become self-documenting and arguments order becomes arbitrary. Named arguments allow passing arguments to a function based on the parameter name rather than position. For details on migrating your code, refer to the Migrating from PHP 7.4.x to PHP 8.0.x guide. For details on what's new in this version, see the release announcement. PHP 8.0 brings new features, syntax additions, and bugfixes.

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