php设计模式工厂、单例、注册树模式，php设计模式-php手册-PHP中文网

php设计模式工厂、单例、注册树模式，php设计模式

php中文网

发布： 2016-06-13 08:45:33

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php设计模式工厂、单例、注册树模式，php设计模式

source code pro字体 easyphp

命名空间：隔离类和函数，php5.3以后

//test5.php<br /><?<span>php
namespace Test5;<span>//命名空间必须是程序脚本的第一条语句,除了declare
<span>function<span> test(){
    <span>echo <span>__FILE__<span>;
}</span></span></span></span></span></span></span>

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//test6.php<br /><?<span>php
namespace Test6;
<span>function<span> test(){
    <span>echo <span>__FILE__<span>;
}</span></span></span></span></span></span>

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<span><span><?php<br />require 'test5.php'<span>;
<span>require 'test6.php'<span>;

Test5\test();
Test6\test();</span></span></span></span></span>

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类自动载入：php5.2以后

spl_autoload_register('autoload1'<span>);

Test5::<span>test();
Test6::<span>test();

<span>function autoload1(<span>$class<span>){
    <span>require __DIR__.'/'.<span>$class.'.php'<span>;
}</span></span></span></span></span></span></span></span></span>

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PSR-0规范：

命名空间必须与绝对路径一致
类名首字母必须大写
除入口文件外，其他“.php” 必须只有一个类。

开发符合PSR-0规范的基础框架

立即学习“PHP免费学习笔记（深入）”；

spl标准库：

PHP链式操作：

<?<span>php
namespace Baobab;

</span><span>class</span><span> Database{
    </span><span>function</span> where(<span>$where</span><span>){
        </span><span>return</span> <span>$this</span><span>;
    }
    
    </span><span>function</span> order(<span>$order</span><span>) {
        </span><span>return</span> <span>$this</span><span>;
    }
    
    </span><span>function</span> limit(<span>$limit</span><span>){
        </span><span>return</span> <span>$this</span><span>;
    }
}

</span>?><br /><br />//index.php<br />$db = new Baobab\Database();<br />$db->where('id = 1')->order('order by id')->limit(1);

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魔术方法：

__get/__set：接管对象属性。在给不可访问属性赋值时，__set() 会被调用；读取不可访问属性的值时，__get() 会被调用。
__call/__callStatic：在对象中调用一个不可访问方法时，__call() 会被调用；用静态方式中调用一个不可访问方法时，__callStatic() 会被调用。
__toString：一个类转化成字符串
__invoke：以调用函数的方式调用一个对象时，__invoke() 方法会被自动调用。

object.php

magento(麦进斗)

Magento是一套专业开源的PHP电子商务系统。Magento设计得非常灵活，具有模块化架构体系和丰富的功能。易于与第三方应用系统无缝集成。Magento开源网店系统的特点主要分以下几大类，网站管理促销和工具国际化支持SEO搜索引擎优化结账方式运输快递支付方式客户服务用户帐户目录管理目录浏览产品展示分析和报表Magento 1.6 主要包含以下新特性：•持久性购物 - 为不同的

查看详情

<?<span>php
namespace Baobab;

</span><span>class</span> <span>Object</span><span>{
    </span><span>protected</span> <span>$array</span> = <span>array</span><span>();
    </span><span>function</span> __set(<span>$key</span>, <span>$value</span><span>){
        </span><span>$this</span>-><span>array</span>[<span>$key</span>] = <span>$value</span><span>;
    }
    </span><span>function</span> __get(<span>$key</span><span>){
        </span><span>//</span><span>echo __METHOD__;</span>
        <span>return</span> <span>$this</span>-><span>array</span>[<span>$key</span><span>];
    }
    
    </span><span>function</span> __call(<span>$func</span>, <span>$param</span><span>){
        </span><span>//</span><span>var_dump($func,$param);</span>
        <span>return</span> 'magic function'<span>;
    }
    
    </span><span>static</span> <span>function</span> __callstatic(<span>$func</span>, <span>$param</span><span>) {
        <span>//</span></span><span>var_dump($func, $param);
        </span><span>return</span> 'magic static function'<span>;
    }
    
    </span><span>function</span><span> __toString(){
        </span><span>return</span> <span>__CLASS__</span><span>;
    }
    
    </span><span>function</span> __invoke(<span>$param</span><span>) {
        </span><span>return</span> <span>var_dump</span>(<span>$param</span><span>);
    }
    
}</span>

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index.php

<span>$obj</span> = <span>new</span> baobab\<span>Object</span><span>();
</span><span>$obj</span>->title = 'hello'<span>;
</span><span>echo</span> <span>$obj</span>-><span>title;
</span><span>echo</span> <span>$obj</span>->test1('hello', 123<span>);
</span><span>echo</span> <span>$obj</span>::test1('hello1', 1234<span>);
</span><span>echo</span> <span>$obj</span><span>;
</span><span>echo</span> <span>$obj</span>('test1');

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1、三种基本设计模式

工厂模式：使用工厂方法或类生产对象，而不是在代码中直接new

Factory.php

<?<span>php
namespace Baobab;

</span><span>class</span><span> Factory{
    </span><span>static</span> <span>function</span><span> createDatabase(){
        </span><span>$db</span> = <span>new</span><span> Database();
        </span><span>return</span> <span>$db</span><span>;
    }
}</span>

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index.php

<span>$db = Baobab\Factory::<span>createDatabase();<br /></span>$db1 = Baobab\Factory::<span>createDatabase();</span></span>

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<span><span><span>$db->limit(<span>$limit);</span></span></span></span>

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单例模式：使某个类的对象仅允许创建一个

Database.php

<?<span>php
namespace Baobab;

</span><span>class</span><span> Database{
   
    </span><span>protected</span> <span>static</span> <span>$db</span><span>;
    
    </span><span>private</span> <span>function</span><span> __construct(){
        
    }
    
    </span><span>static</span> <span>function</span><span> getInstance(){
        </span><span>if</span> (self::<span>$db</span><span>){
            </span><span>return</span> self::<span>$db</span><span>;
        }</span><span>else</span><span>{
            </span><span>//</span><span>self是指向类本身，也就是self是不指向任何已经实例化的对象(::域运算符号)</span>
            self::<span>$db</span> = <span>new</span><span> self();
            </span><span>return</span> self::<span>$db</span><span>;
        }
    }</span>

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index.php

<span>$db</span> = Baobab\Database::getInstance();

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注册模式：解决全局共享和交换对象，将对象注册到全局树上，可以在任何地方被直接访问

<?<span>php
namespace Baobab;

</span><span>class</span><span> Register{
    </span><span>protected</span> <span>static</span> <span>$objects</span><span>;
    </span><span>static</span> <span>function</span> set(<span>$alias</span>, <span>$object</span><span>){
        self</span>::<span>$objects</span>[<span>$alias</span>] = <span>$object</span><span>;
    }
    
    </span><span>static</span> <span>function</span> _unset(<span>$alias</span><span>) {
        </span><span>unset</span>(self::<span>$objects</span>[<span>$alias</span><span>]);
    }
    
    </span><span>static</span> <span>function</span> get(<span>$name</span><span>) {
        </span><span>return</span> self::<span>$objects</span>[<span>$name</span><span>];
    }
}</span>

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<span>//将db注册到注册树上</span>
Register::set('db1', <span>$db</span><span>);      </span>

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index.php

<span>$db</span> = Baobab\Register::get('db1');

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php设计模式 工厂、单例、注册树模式，php设计模式

php设计模式 工厂、单例、注册树模式，php设计模式

php设计模式工厂、单例、注册树模式，php设计模式

php设计模式工厂、单例、注册树模式，php设计模式