Improvements 🔧

• Initial PHP 8 support!
  • PHPStan can now analyse sources for PHP 7.x when running on PHP 8. Not all the new PHP 8 features are supported yet.
  • Support for native union types (phpstan/phpstan-src@39f8909)
  • Support for native mixed type (phpstan/phpstan-src@a9043e0)
• Set different PHP version than your runtime
  • If you set different phpVersion parameter in your phpstan.neon, you can for example tell PHPStan to analyse source code like it's written for PHP 7.4 even if you're running PHP 8. The phpVersion config parameter is in PHP_VERSION_ID format - for PHP 7.4, use 70400.
  • You can also set a newer PHP version. So you can run PHPStan on 7.4, but already test compatibility with PHP 8 by setting phpVersion to 80000.
• Check uninitialized typed properties that aren't set in the constructor (phpstan/phpstan-src@a1eb1f5), #2984
  • Off by default, needs checkUninitializedProperties: true.
• Show error on unescaped () in ignoreErrors (phpstan/phpstan-src@8479d40), #3602

Bleeding edge 🔪

• Detect unused and write-only/read-only private properties, methods, and constants (level 4)
  • Read more on the PHPStan's blog
• config.platform.php in project's composer.json is respected and overrides the current runtime PHP version (phpstan/phpstan-src@d235195).

If you want to see the shape of things to come and adopt bleeding edge features early, you can include this config file in your project's phpstan.neon:

includes:
	- vendor/phpstan/phpstan/conf/bleedingEdge.neon

Of course, there are no backwards compatibility guarantees when you include this file. The behaviour and reported errors can change in minor versions with this file included.

Bugfixes 🐛

• Skip not deprecated methods (#267), thanks @malarzm!
• Type aliases cannot be used internally because they might clash with an existing class name (phpstan/phpstan-src@4d08280), #3569
• Fix covariant type check when template has bound (#272), thanks @hrach!

Function signature fixes 🤖

• Updated phpstorm-stubs (phpstan/phpstan-src@e1f492c), #3539, #3512, #3525
• Updated GD's image* functions (#265), thanks @javajawa!
• PDOStatement::fetchColumn can return an int (#266), thanks @anthonyryan1!
• XMLReader::expand may return false on error (#273), thanks @taavit!
• SQLite3Stmt::execute to return false (#275), thanks @colinmo!
• mime_content_type can receive a stream too (#276), thanks @gnutix!
• Fix date_time_set function signature (#280), thanks @olivierchabert!