Hard
What will this code display?
<?php
class Foo
{
private ?string $bar;
public function setBar(?string $secondLine): void
{
$this->bar = $secondLine;
}
public function getBar(): ?string
{
return $this->bar;
}
}
$foo = new Foo();
echo $foo->getBar() ?? 'john doe';
Author: W3D TeamStatus: PublishedQuestion passed 1386 times
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Is this function signature valid?
```php
<?php
interface Demo
{
public function bar(): ?mixed;
}
```