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Original file line number | Diff line number | Diff line change |
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<?php declare(strict_types = 1); | ||
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namespace PHPStan\Rules\Functions; | ||
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use PhpParser\Node; | ||
use PhpParser\Node\Expr\FuncCall; | ||
use PhpParser\Node\Name; | ||
use PHPStan\Analyser\ArgumentsNormalizer; | ||
use PHPStan\Analyser\Scope; | ||
use PHPStan\Reflection\ParametersAcceptorSelector; | ||
use PHPStan\Reflection\ReflectionProvider; | ||
use PHPStan\Rules\Rule; | ||
use PHPStan\Rules\RuleErrorBuilder; | ||
use PHPStan\Type\Type; | ||
use PHPStan\Type\VerbosityLevel; | ||
use function count; | ||
use function sprintf; | ||
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/** | ||
* @implements Rule<FuncCall> | ||
*/ | ||
class ArrayFilterStrictRule implements Rule | ||
{ | ||
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/** @var ReflectionProvider */ | ||
private $reflectionProvider; | ||
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/** @var bool */ | ||
private $treatPhpDocTypesAsCertain; | ||
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/** @var bool */ | ||
private $checkNullables; | ||
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public function __construct( | ||
ReflectionProvider $reflectionProvider, | ||
bool $treatPhpDocTypesAsCertain, | ||
bool $checkNullables | ||
) | ||
{ | ||
$this->reflectionProvider = $reflectionProvider; | ||
$this->treatPhpDocTypesAsCertain = $treatPhpDocTypesAsCertain; | ||
$this->checkNullables = $checkNullables; | ||
} | ||
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public function getNodeType(): string | ||
{ | ||
return FuncCall::class; | ||
} | ||
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public function processNode(Node $node, Scope $scope): array | ||
{ | ||
if (!$node->name instanceof Name) { | ||
return []; | ||
} | ||
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if (!$this->reflectionProvider->hasFunction($node->name, $scope)) { | ||
return []; | ||
} | ||
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$functionReflection = $this->reflectionProvider->getFunction($node->name, $scope); | ||
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if ($functionReflection->getName() !== 'array_filter') { | ||
return []; | ||
} | ||
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$parametersAcceptor = ParametersAcceptorSelector::selectFromArgs( | ||
$scope, | ||
$node->getArgs(), | ||
$functionReflection->getVariants(), | ||
$functionReflection->getNamedArgumentsVariants() | ||
); | ||
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$normalizedFuncCall = ArgumentsNormalizer::reorderFuncArguments($parametersAcceptor, $node); | ||
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if ($normalizedFuncCall === null) { | ||
return []; | ||
} | ||
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$args = $normalizedFuncCall->getArgs(); | ||
if (count($args) === 0) { | ||
return []; | ||
} | ||
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if (count($args) === 1) { | ||
return [ | ||
RuleErrorBuilder::message('Call to function array_filter() requires parameter #2 to be passed to avoid loose comparison semantics.') | ||
->identifier('arrayFilter.strict') | ||
->build(), | ||
]; | ||
} | ||
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$nativeCallbackType = $scope->getNativeType($args[1]->value); | ||
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if ($this->treatPhpDocTypesAsCertain) { | ||
$callbackType = $scope->getType($args[1]->value); | ||
} else { | ||
$callbackType = $nativeCallbackType; | ||
} | ||
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if ($this->isCallbackTypeNull($callbackType)) { | ||
$message = 'Parameter #2 of array_filter() cannot be null to avoid loose comparison semantics (%s given).'; | ||
$errorBuilder = RuleErrorBuilder::message(sprintf( | ||
$message, | ||
$callbackType->describe(VerbosityLevel::typeOnly()) | ||
))->identifier('arrayFilter.strict'); | ||
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if (!$this->isCallbackTypeNull($nativeCallbackType) && $this->treatPhpDocTypesAsCertain) { | ||
$errorBuilder->tip('Because the type is coming from a PHPDoc, you can turn off this check by setting <fg=cyan>treatPhpDocTypesAsCertain: false</> in your <fg=cyan>%configurationFile%</>.'); | ||
} | ||
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return [$errorBuilder->build()]; | ||
} | ||
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return []; | ||
} | ||
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private function isCallbackTypeNull(Type $callbackType): bool | ||
{ | ||
if ($callbackType->isNull()->yes()) { | ||
return true; | ||
} | ||
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if ($callbackType->isNull()->no()) { | ||
return false; | ||
} | ||
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return $this->checkNullables; | ||
} | ||
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} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,58 @@ | ||
<?php declare(strict_types = 1); | ||
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namespace PHPStan\Rules\Functions; | ||
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use PHPStan\Rules\Rule; | ||
use PHPStan\Testing\RuleTestCase; | ||
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/** | ||
* @extends RuleTestCase<ArrayFilterStrictRule> | ||
*/ | ||
class ArrayFilterStrictRuleTest extends RuleTestCase | ||
{ | ||
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/** @var bool */ | ||
private $treatPhpDocTypesAsCertain; | ||
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/** @var bool */ | ||
private $checkNullables; | ||
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protected function getRule(): Rule | ||
{ | ||
return new ArrayFilterStrictRule($this->createReflectionProvider(), $this->treatPhpDocTypesAsCertain, $this->checkNullables); | ||
} | ||
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protected function shouldTreatPhpDocTypesAsCertain(): bool | ||
{ | ||
return $this->treatPhpDocTypesAsCertain; | ||
} | ||
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public function testRule(): void | ||
{ | ||
$this->treatPhpDocTypesAsCertain = true; | ||
$this->checkNullables = true; | ||
$this->analyse([__DIR__ . '/data/array-filter-strict.php'], [ | ||
[ | ||
'Call to function array_filter() requires parameter #2 to be passed to avoid loose comparison semantics.', | ||
15, | ||
], | ||
[ | ||
'Call to function array_filter() requires parameter #2 to be passed to avoid loose comparison semantics.', | ||
25, | ||
], | ||
[ | ||
'Call to function array_filter() requires parameter #2 to be passed to avoid loose comparison semantics.', | ||
26, | ||
], | ||
[ | ||
'Parameter #2 of array_filter() cannot be null to avoid loose comparison semantics (null given).', | ||
28, | ||
], | ||
[ | ||
'Parameter #2 of array_filter() cannot be null to avoid loose comparison semantics ((Closure)|null given).', | ||
34, | ||
], | ||
]); | ||
} | ||
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} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,36 @@ | ||
<?php declare(strict_types = 1); | ||
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namespace ArrayFilterStrict; | ||
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/** @var list<int> $list */ | ||
$list = [1, 2, 3]; | ||
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/** @var array<string, int> $array */ | ||
$array = ["a" => 1, "b" => 2, "c" => 3]; | ||
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array_filter([1, 2, 3], function (int $value): bool { | ||
return $value > 1; | ||
}); | ||
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array_filter([1, 2, 3]); | ||
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array_filter([1, 2, 3], function (int $value): bool { | ||
return $value > 1; | ||
}, ARRAY_FILTER_USE_KEY); | ||
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array_filter([1, 2, 3], function (int $value): int { | ||
return $value; | ||
}); | ||
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array_filter($list); | ||
array_filter($array); | ||
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array_filter($array, null); | ||
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array_filter($list, 'intval'); | ||
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/** @var bool $bool */ | ||
$bool = doFoo(); | ||
array_filter($list, foo() ? null : function (int $value): bool { | ||
return $value > 1; | ||
}); |