<?php
class hello
{
function ko(){echo 'こ';return $this;}
function n(){echo 'ん';return $this;}
function ni(){echo 'に';return $this;}
function ti(){echo 'ち';return $this;}
function ha(){echo 'は';return $this;}
}
$obj= new hello();
$obj->ko()->n()->ni()->ti()->ha();
?>