<?php
function sayHello(string $name = "Dr.Manhattan"):string{
    return "hello $name";}

    function whoAmI(string $name, array $watchmen=[]):string{
      array_push($watchmen, 'Dr. Manhattan',
          'Ozymandias',
          'Silk Spectre',
          'Rorschach',
          'The comedian',
          'Nite Owl')   ;

        $answer = "$name n'est pas un watchman";
           foreach ($watchmen as $watchman){
               if ($name == $watchman){
               $answer = "$name is a watchmen";