Improvements 🔧

• Add new *ParameterClosureTypeExtension (#3089), thanks @canvural!
• DynamicFunctionReturnTypeExtension for the get_debug_type function (#2910), #10558, #10585, thanks @patrickkusebauch!
• Infer more duplicated array keys (#3058), #6976, thanks @VincentLanglet!
• Improve explode return type precision (#3096), thanks @staabm!
• Make assigning property via reference impure (#3082), thanks @schlndh!
• Support new PHP 8.4 mb_lcfirst, mb_ucfirst function variants (#3095), thanks @staabm!

Bugfixes 🐛

• Make array_map argument take into account unpack (#2901), #10527, thanks @ryium!
• Fixes incorrect types reported by parse_url (#2918), #4754, thanks @ChrisBrenton!
• Ensure $http_response_header is a list<string> (#2959), thanks @Seldaek!
• Keep numeric-strings in str_repeat() (#2914), #10572, thanks @staabm!
• Array is non-empty even when in_array is not strict (#2539), #9662, #10228, thanks @staabm!
• Fix substr() type narrowing for possibly single char result (#3081), #11035, #9804, thanks @staabm!
• Fix escaping of the error message in various output formatters (#3087), thanks @mousetail!
• $this cannot be reassigned when passed by reference (#3097), #10477, thanks @takaram!
• Subtract zero-float when comparing against zero-int (#3102), #5309, thanks @staabm!
• Fix fatal error on constant('') (#3013), #10867, thanks @staabm!

Function signature fixes 🤖

• Add new header functions for PHP 8.4 (#3093), thanks @Seldaek!
• Fix wrong return type for SplFileObject::fgets() (#3103), thanks @DanielSiepmann!
• Update Locale signatures (#2880), #7855, #8149, thanks @devnix!
• Fix wrong fread() length parameter type and return type (#3105), thanks @thg2k!
• ReflectionFunction and ReflectionMethod::getClosure cannot return null (https://github.com/phpstan/phpstan-src/commit/dae9335075964f197aa5d965b3d38c12788a6405), #10839
• Make method names non-falsy-string (#3108), thanks @schlndh!

Internals 🔍

• Add regression test (#3066), #3300, thanks @herndlm!
• Update phpdoc-parser (#3107)
  • TemplateTagValueNode::$name cannot be empty string (https://github.com/phpstan/phpdoc-parser/commit/fcaefacf2d5c417e928405b71b400d4ce10daaf4), thanks @staabm!
• Fix property descriptions in ReflectionProviderGoldenTest (#3109), thanks @schlndh!