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IllegalConstructorStaticCallRule.php
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IllegalConstructorStaticCallRule.php
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<?php declare(strict_types = 1);
namespace PHPStan\Rules\Methods;
use PhpParser\Node;
use PHPStan\Analyser\Scope;
use PHPStan\Rules\Rule;
use PHPStan\Rules\RuleErrorBuilder;
/**
* @implements Rule<Node\Expr\StaticCall>
*/
class IllegalConstructorStaticCallRule implements Rule
{
public function getNodeType(): string
{
return Node\Expr\StaticCall::class;
}
public function processNode(Node $node, Scope $scope): array
{
if (!$node->name instanceof Node\Identifier || $node->name->toLowerString() !== '__construct') {
return [];
}
if ($this->isCollectCallingConstructor($node, $scope)) {
return [];
}
return [
RuleErrorBuilder::message('Static call to __construct() is only allowed on a parent class in the constructor.')
->build(),
];
}
private function isCollectCallingConstructor(Node $node, Scope $scope): bool
{
if (!$node instanceof Node\Expr\StaticCall) {
return true;
}
// __construct should be called from inside constructor
if ($scope->getFunction() !== null && $scope->getFunction()->getName() !== '__construct') {
return false;
}
if (!$scope->isInClass()) {
return false;
}
if (!$node->class instanceof Node\Name) {
return false;
}
return $node->class->toLowerString() === 'parent';
}
}