__unset()这是怎么了
class Person {<br />
private $name;<br />
private $age;<br />
private $sex;<br />
//2. 构造方法 //作用: 给对象属性初始值<br />
function __construct($name='', $age='0', $sex='男'){ <br />
$this->name=$name;<br />
$this->age=$age;<br />
$this->sex=$sex;<br />
}<br />
private function __set($proName, $proValue){<br />
if($proName == 'age'){<br />
if($proValue<0 || $proValue>100){<br />
echo '设置的年龄不合法';<br />
return;<br />
}else{<br />
$this->$proName=$proValue;<br />
echo $this->age.'<br />';<br />
}<br />
}<br />
}<br />
private function __get($proName){<br />
if($proName == 'age'){<br />
echo ($this->$proName-20).'<br />';<br />
}<br />
}<br />
private function __isset($proName){<br />
if(isset($this->$proName)){<br />
echo $this->$proName.'存在<br />';<br />
return;<br />
}<br />
echo $proName.'不存在<br />';<br />
}<br />
private function __unset($proName){<br />
unset($this->$proName);<br />
}<br />
function say(){<br />
echo 'name........'.$this->name.'|age.........'.$this->age.'|sex..........'.$this->sex.'<br />';<br />
}<br />
function __destruct(){<br />
}<br />
}<br />
$p1 = new Person('yeteng', 26, '男');<br />
$p2 = new Person('yeben', 28, '男');<br />
$p3 = new Person('wenjing', 40, '女');<br />
$p1->age=99; //自动触发__set<br />
$p1->age; //自动触发__get<br />
isset($p1->name);//自动触发__isset<br />
<br />
unset($p1->age); //自动触发__unset<br />
$p1->say();
