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Fix phpstan/phpstan#14407: !in_array with enum values incorrectly narrows to NEVER#5365

Merged

VincentLanglet merged 15 commits into

phpstan:2.1.xfrom

phpstan-bot:create-pull-request/patch-k4otjc0

Apr 1, 2026

Commits on Apr 1, 2026

Fix phpstan/phpstan#14407: !in_array with enum values incorrectly narrows to *NEVER*

phpstan-bot
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staabm
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Refactor: use single TypeCombinator::intersect call for performance

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staabm
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Handle optional keys in constant arrays for !in_array narrowing

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staabm
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Refactor: defer narrowing computation to avoid unnecessary work in !in_array

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staabm
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Refactor: extract computeGuaranteedValueType private method

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staabm
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Refactor: extract computeNeedleNarrowingType to unify true/false context logic

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staabm
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Refactor: inline computeGuaranteedValueType into computeNeedleNarrowingType

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staabm
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Return null instead of fallback to $arrayValueType when $innerValueTypes is empty

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staabm
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Refactor: use Type::getArrays() instead of manual union decomposition

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staabm
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Skip narrowing for non-constant arrays with multiple possible value types

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staabm
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Rework

VincentLanglet
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staabm
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Add instanceof ConstantArrayType to phpstan baseline

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staabm
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Add non-regression tests for phpstan/phpstan#13421 and phpstan/phpstan#8864

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staabm
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Remove comment

VincentLanglet
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staabm
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Add non-regression rule tests for strict comparison false positives

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staabm
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