Online PHP editor | output for hITTk

<?php declare(strict_types=1); final class CreateStatementRequest { private ?DateTimeImmutable $startDate, $endDate; public function __construct( DateTimeImmutable $startDate = null, DateTimeImmutable $endDate = null ) { $this->startDate = $startDate; $this->endDate = $endDate; // error: Property CreateStatementRequest::$endDate (DateTimeImmutable) does not accept DateTimeImmutable|null. } public function hasFilterStartDate(): bool { return $this->startDate !== null; } public function getFilterStartDate(): DateTimeImmutable { if ($this->startDate === null) { throw new RuntimeException('The start date filter is not defined.'); } return $this->startDate; } public function hasFilterEndDate(): bool { return $this->endDate !== null; } public function getFilterEndDate(): DateTimeImmutable { if ($this->endDate === null) { // error: Strict comparison using === between DateTimeImmutable and null will always evaluate to false. throw new RuntimeException('The end date filter is not defined.'); } return $this->endDate; } } $ref = new \ReflectionClass(CreateStatementRequest::class); foreach ($ref->getProperties() as $refProperty) { var_dump($refProperty->getName()); $refType = $refProperty->getType(); var_dump($refType->getName()); var_dump($refType->allowsNull()); var_dump('---'); }