建造者模式

建造者模式：将一个复杂的对象的构建与它的表示分离，使得同样的构建过程可以创建不同的表示。

建造者模式结构图：

php实现：

<?php
class Product{
    public $part1;
    public $part2;
    public function setPart1($v){
        $this->part1 = $v;
    }
    public function setPart2($v){
        $this->part2 = $v;
    }
}

abstract class Builder{
    public abstract function BuildPart1($v);
    public abstract function BuildPart2($v);
}

class concreteBuilder extends Builder{
    private $product;
    public function __construct(){
        $this->product = new Product();
    }
    function BuildPart1($v1){
        $this->product->setPart1($v1);
    }
    function BuildPart2($v2){
        $this->product->setPart2($v2);;
    }
    function getProduct(){
        return $this->product;
    }
}

class Director{
    private $builde;
    public function __construct(){
        $this->builder = new concreteBuilder();
    }
    function getProductA(){
        $this->builder->BuildPart1("a");
        $this->builder->BuildPart2("aa");
        return $this->builder->getProduct();
    }
    function getProductB(){
        $this->builder->BuildPart1("b");
        $this->builder->BuildPart2("bb");
        return $this->builder->getProduct();
    }
}

class Client{
    function run(){
        $director = new Director();
        $productA = $director->getProductA();
        echo $productA->part1;
    }
}

Client::run();