面向对象的哲学。举例：小明被撞了，智商一百早上好。智商不好，乱说

<?php
header("Content-Type:text/html;charset=utf-8");
class People{
public $iq = 100;
public function Sayhello(){//打招呼
$say = array("good morning","good noon","good evening");
if($this->iq >= 100){//智商大于等于100    goodmorning
echo $say[0];
}else{
$i = rand(0,2);//随机
echo $say[$i];
}
}
}
class Car{
public function Hitme($people){  //撞了下
$iqs = rand(50,110);//智商随你在50-100.
$people -> iq = $iqs;//赋给传过来的人！！！
}
}
$ming = new People();//生成人
$BMW = new Car();//生成汽车
$BMW -> Hitme($ming);//宝马撞了小明
$ming -> sayhello();
$BMW -> Hitme($ming);
$ming -> sayhello();
$BMW -> Hitme($ming);
$ming -> sayhello();