Phpstan array

It has a point of course, purely from static analysis it cannot reliably be inferred that c will always be of the string[] type - the phpdoc typehint declares it could be a string as well some day. In phpstan array practical case however, due to the definition of the API I'm calling, I cannot know beforehand that a and b are the only string keys, only that all non- c keys will be string keys with string values. Array shape does, to my knowledge, not support any definition for unknowns, phpstan array, for example the following are phpstan array unacceptable:. See lines 20 and

In some cases PHPStan knows about the literal value of an expression. Some types exist to only consist of other types learn more about union vs. This table describes which implementation is used for different bounds the X in template T of X :. Following list is by no means complete, please see the interface code for more details. The describe method returns a string representation description of the type, which is useful for error messages.

Phpstan array

PHPStan 1. My role has shifted from the main code contributor to quality assurance, project vision [1] , and taking care of the continuous integration pipeline. At the current rate of quality pull requests from rvanvelzen1 markusstaab and herndlm I might just rename my job title to "green button pusher". This feature was developed by Richard van Velzen. After generics and conditional return types PHPStan continues to democratize its advanced features. Besides arguments, it also supports narrowing types of properties and returned values from other methods on the same object. Learn everything about this new feature in the documentation ». List in PHPStan is an array with sequential integer keys starting at 0 and with no gaps. It joins many other advanced types expressible in PHPDocs :. We had to go through all of those and decide:. If you want to try it now, include bleedingEdge. This feature was developed by Markus Staab. So if a parameter is assigned by reference, the type after the function call is always mixed :. The type of a mutable object can change after calling a mutating method. The list of extension types you can implement is already pretty hefty, and gets a new one today.

Written as Type1 Type2. PHPStan 1. This feature was developed by Markus Staab.

Currently, it is not possible to define explicit array types as other programming languages do as Java does. There have been some attempts to achieve that. One of the most recent ones was done by Nikita Popov in this pull request. Hopefully, some tools like PHPStan or Psalm help us to analyze the code statically, which means, they do not execute but check the code for inconsistencies based on PHP comments. This is a fashioned way to define a list of elements from a certain type, the problem is it becomes ambiguous, and clients that use this kind of list cannot know if keys are integers, floats or strings. We use lists when we have an array of elements with the same type. We use object shape when the array is not a collection of objects but a map which holds information.

PHP 8 is just around the corner! PHPStan is ready to analyse your codebases that will be taking advantage of the latest features in the coming weeks and months. Make sure you have PHPStan 0. Ambitious language feature from PHPStan contributor Ilija Tovilo that aims to be a better alternative to a switch statement. Arms also might not be executed if one of the arms is a catch-all because the comparison will be always true. Since PHPStan knows enough information about the code, it can detect it as well.

Phpstan array

Today I was trying to fix some "missing iterable value type" errors and I have a problem to satisfy PHPStan when nested arrays. The documentation does not explicitly mention whether PHPStan supports nested array shapes I think docs should be updated with this information. I can created a PR but I need an answer.

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One of the most recent ones was done by Nikita Popov in this pull request. It has a point of course, purely from static analysis it cannot reliably be inferred that c will always be of the string[] type - the phpdoc typehint declares it could be a string as well some day. Select a reply. There are methods that answer questions about properties, methods, and constants accessed on a type. Create a new saved reply. See lines 20 and Edit this page on GitHub. There isn't a syntax I'd like for "array shapes with extra keys of known type". In short, it means a string that is either written by a developer or composed only of developer-written strings. Beta Was this translation helpful? This feature was developed by Markus Staab.

Two years ago I wrote an impactful article on union and intersection types. It helped the PHP community to familiarize themselves with these concepts which eventually led to intersection types support in PhpStorm.

Marking a function or a method as return never tells PHPStan the function always throws an exception, or contains a way to end the script execution, like die or exit. So any interface or non-final class can have an infinite number of child classes. We had to go through all of those and decide:. List type This feature was developed by Richard van Velzen. Rule level 9 is stricter about the mixed type. Missing typehint is implicit mixed - no type was specified as a parameter type or a return type. Available in PHPStan 1. If you want to try it now, include bleedingEdge. Type refactoring has begun! In short, it means a string that is either written by a developer or composed only of developer-written strings. This is useful if we want to tell that a method from a parent class will return an object of the child class when the parent class is extended see example.