php面向对象之$this->用法简述

<?php
header("content-type:text/html;charset=utf-8");
class Preson{                                                //定义类
  public $name;
  public $age;
  public function __construct($Name,$Age)        //构造函数
  {
     $this -> name = $Name;
     $this -> age = $Age;
     echo &#39;<pre class="brush:php;toolbar:false">&#39;;
     var_dump($this);                  //打印出$this
  }
  public function showInfo(){             //成员方法
     echo "个人信息：";
     echo &#39;<br/>&#39; . "名字是：" . $this -> name . &#39;<br/>&#39; . "年龄是：" . $this -> age;
  }
}
$preson = new Preson("小草",25);           //实例化
var_dump($preson);                    //打印出$this
$preson -> showInfo();
echo &#39;<hr>&#39;;
$preson = new Preson("大树",30);           //实例化
var_dump($preson);                   //打印出$preson
$preson -> showInfo();