Error when passing string into method with type hinting

Question

In the code below I call a function (it happens to be a constructor) in which I have type hinting. When I run the code I get the following error:

Catchable fatal

Answer 1

Just remove string from constructor (not supported) , it should work fine eg:

function __construct($anAnswer)
{
   $this->theAnswer = $anAnswer;
}

Working Example:

class Question
{
   /**
    * The answer to the question.
    * @access private
    * @var string
    */
   public $theAnswer;

   /**
    * Creates a new question with the specified answer.
    * @param string $anAnswer the answer to the question
    */
   function __construct($anAnswer)
   {
      $this->theAnswer = $anAnswer;
   }
}

$question = new Question("An Answer");
echo $question->theAnswer;