What is the output of the following code?

What is the output of the following code?

class a

{

public $val;

function renderVal (a $a)

{

if ($a) {

echo $a->val;

renderVal (null);
A . A syntax error in the function declaration line
B . An error, because null is not an instance of ‘a’
C . Nothing, because a null value is being passed to renderVal()
D . NULL

View Answer

Answer: B