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What is the result of the following code?
class MyCollection {
private $coll = [];
public function add(?int $x): void {
$this->coll[] = $x ?? 0;
}
public function getElements(): iterable {
return $this->coll;
}
}
$collection = new MyCollection();
$collection->add(null);
$collection->add(1);
$collection->add(0);
print_r($collection->getElements());- A) Array([0] => 0, [1] => 1, [2] => 0);
- B) A parse error because the "?int" type does not exist;
- C) A parse error because the "??" operator can be applied only to strings;
- D) A runtime error because the "coll" field is not "iterable"; "array" should be used instead;
Answer
Answer: A