Description:
------------
---
From manual page: http://www.php.net/language.oop5.constants
---

why anyone can override constant of class?
in c++, i can assign const value only in construct method of class

Test script:
---------------
<?php

class test{
	const NAME = 100;
	public function ech(){
		$this->NAME = 300;
		$this->echt();
	}
	public function echt(){
		$this->NAME = 200;
		echo $this->NAME;
	}
}

$a=new test();
echo $a->ech();