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DateIntervalDynamicReturnTypeExtension.php
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DateIntervalDynamicReturnTypeExtension.php
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<?php declare( strict_types = 1 );
namespace PHPStan\Type\Php;
use DateInterval;
use PhpParser\Node\Expr\StaticCall;
use PHPStan\Analyser\Scope;
use PHPStan\Reflection\MethodReflection;
use PHPStan\Type\Constant\ConstantBooleanType;
use PHPStan\Type\Constant\ConstantStringType;
use PHPStan\Type\DynamicStaticMethodReturnTypeExtension;
use PHPStan\Type\ObjectType;
use PHPStan\Type\Type;
use function array_map;
use function count;
use function gettype;
use function in_array;
class DateIntervalDynamicReturnTypeExtension
implements DynamicStaticMethodReturnTypeExtension
{
public function getClass(): string
{
return DateInterval::class;
}
public function isStaticMethodSupported(MethodReflection $methodReflection): bool
{
return $methodReflection->getName() === 'createFromDateString';
}
public function getTypeFromStaticMethodCall(MethodReflection $methodReflection, StaticCall $methodCall, Scope $scope): ?Type
{
$arguments = $methodCall->getArgs();
if (!isset($arguments[0])) {
return null;
}
$strings = $scope->getType($arguments[0]->value)->getConstantStrings();
$possibleReturnTypes = array_map(
static fn (ConstantStringType $s): string => gettype(@DateInterval::createFromDateString($s->getValue())),
$strings,
);
// the error case, when wrong types are passed
if (count($possibleReturnTypes) === 0) {
return null;
}
if (in_array('boolean', $possibleReturnTypes, true) && in_array('object', $possibleReturnTypes, true)) {
return null;
}
if (in_array('boolean', $possibleReturnTypes, true)) {
return new ConstantBooleanType(false);
}
return new ObjectType(DateInterval::class);
}
}