What is the output of the following code? class a { public $val; } function renderVal (a $a) { if ($a) { echo $a-val; } } renderVal (null);

Question

What is the output of the following code? class a { public $val; } function renderVal (a $a) { if ($a) { echo $a->val; } } renderVal (null);

Accepted Answer

B. An error, because null is not an instance of 'a'

Answer

A. A syntax error in the function declaration line

Answer

C. Nothing, because a null value is being passed to renderVal()

Answer

D. NULL

What is the output of the following code? class a { public $val; } function renderVal (a $a) { if ($a) { echo $a->val; } } renderVal (null);