Windows에서 엄격해 보이는 PHP(jook e)

<?php
namespace ¥\¥{
    class ¥{
        static public function ¥(){
            echo "\\ is not ¥".PHP_EOL;
        }
    }
}

namespace {
    \¥\¥\¥::¥();
}

on mac

meanwhile in windows(JP).