15.php原型模式

<?php
class Fish{
    protected $name;
    protected $age;
    protected $weight;
    protected $message="还是一条活鱼";
    
    function __construct($name, $age, $weight){
        $this->name = $name;
        $this->age = $age;
        $this->weight = $weight;
    }
    
    function say(){
        echo $this->name.';'.$this->age.';'.$this->weight.';'.$this->message;
    }
}

class doBraiseFish extends Fish{
    function __clone(){
        $this->message = '变成红烧鱼';
    }
}

//还是一条活鱼
$fish = new doBraiseFish('草鱼', 2, '2kg');

$Braisefish = clone($fish);
$Braisefish->say();