类常量

<?php
//类常量
class BaseClass{
const NAME="欧阳冬";
const AGE=30;
const ADDRESS="湖北省襄阳市";
static function action(){
return array(
"姓名"=>self::NAME,
"年龄"=>self::AGE,
"地址"=>self::ADDRESS,
);
}
}
?>

<?php
//继承于BaseClass
class sonClass extends BaseClass{
function result(){
return parent::action();
}
}
?>

<?php
//调用
$class=new sonClass();
var_dump($class->result());
?>

输出：

array (size=3)
  '姓名' => 

string

 '欧阳冬' (length=6)
 '年龄' => 

int

 30
 '地址' => 

string

 '湖北省襄阳市' (length=12)