PHP array_column() not returning object falsy values

I'm sure this is expected behavior for array_column():

class myObj {
    public $prop;
    public function __construct(int $prop) {
        $this->prop = $prop;
    }
}

$objects = [
    new myObj(7),
    new myObj(3),
    new myObj(8),
    new myObj(0),
    new myObj(2),
    new myObj(6)
];

echo '<pre>';
print_r(array_column($objects, 'prop'));
echo '</pre>';

Returns:

Array (
    [0] => 7
    [1] => 3
    [2] => 8
    [3] => 2
    [4] => 6
)

The 0 is missing. Maybe it uses empty() internally..?

Why would it not return falsy values when 0 and false can be normal valid object property values, and array_column() is meant for returning values..?

What's the best work around..?