实例化php类的时候如何传参

例：

person.class.php

<?php  
    class person{  
        var $name;  
        var $color;  
        var $sex;  
        var $age;  
        function __construct($name,$age='',$sex='boy'){  
            $this->name = $name;  
            $this->age = $age;  
            $this->sex = $sex;  
            $this->color = 'yello';  
        }  
        function eat(){  
            echo $this->name.'要吃饭';  
        }  
        function xinxi(){  
            echo $this->name.' is '.$this->sex.' and age is '.$this->age.' fuse is '.$this->color;  
        }  
    }  
?>  

son.php

<?php  
    include('person.class.php');  
    $son = new person('cuihua',25,'girl');//此处的参数传递要和类的构造方法里面的参数顺序对应  
    //$son->xinxi();//cuihua is girl and age is 25 fuse is yello  
    $son->name = '田妞';  
    $son->eat();//田妞要吃饭  
?>