class Person{  
private $name;  
private $age;  
private $sex;  
function __construct($name="",$age=20,$sex="male"){  
$this->name=$name;  
$this->age=$age;  
$this->sex=$sex;  
}  
function getPro($name){  
return $this->$name;  
}  
function setAge($age){  
if($age>100$age<0){  
return;  
}  
$this->age=$age;  
}  
function getAge(){  
if($this->age<30){  
return $this->age;  
}elseif($this->age<40){  
return $this->age-5;  
}elseif($this->age<50){  
return $this->age-10;  
}else{  
return $this->age-15;  
}  
}  
function say(){  
echo "我的名字是：".$this->name.",年龄是：".$this->age."，性别是：".$this->sex.'<br>';  
}  
function __destruct(){  
echo $this->name.",再见"."<br>";  
}  
}  
$p1=new Person("rayhooo",26,"male");  
$p1->say();  
echo $p1->getPro("name").'<br>';  
$p1->setAge(45);  
echo $p1->getAge().'<br>';