PHP常见设计模式简单实现

<?php
/**
 * @author jinliang
 * @date 2013-1-2
 * @file b.class.php
 */

//单例设计
class singleton{
   private static $s = array();
   
   private function __construct(){
   
   }
   
    public static function getInstance($classname){
        if(empty(self::$s[$classname])){
            self::$s[$classname] = new $classname();
        }
        return self::$s[$classname];
    }
   
    public function printInfo(){
        echo get_called_class();
    }
}

//工厂方法模式
interface Sender{
    public function send();
}

class MailSend implements Sender{
    public function send(){
        echo "send mail";
    }
}

class SmsSend implements Sender{
    public function send(){
        echo "send sms";
    }
}

class SendFactory {
    //private static $send;
    public static function produce($type){
        if($type == 'mail') {
            return new MailSend();
        } else if($type == 'sms') {
            return new SmsSend();
        } else {
            return '请输入正确的类型';
        }
    }
}


//代理模式

interface Person {
    public function eat();
}

class Baby implements Person{
    private $name;
    public function __construct($name){
        $this->name = $name;
    }
 
    public function eat(){
        echo $this->name."吃钣";
    }
}

class Mother implements Person{
    private $baby;
    public function __construct($baby){
        $this->baby = $baby;
    }
 
    private function eatBefor(){
        echo "吃之前";
    }
 
    private function eatAfter(){
        echo "吃之后";
    }
 
 public function eat(){
     $this->eatBefor();
     $this->baby->eat();
     $this->eatAfter();
 }
}

//适配器模式
interface TypeA{
    public function insert();
}

interface TypeB{
    public function connect();
}


class TypeAimpl implements TypeA{
    public function insert(){
        echo "Start insert<br/>";
    }
}

class TypeBimpl implements TypeB{
    public function connect(){
        echo "Start connect<br/>";
    }
}

class createA{
    private $typeA;
    public function __construct($typeA){
        $this->typeA = $typeA;
    }
    public function dotypeA(){
       echo "other...things<br/>";
       $this->typeA->insert();
   }
}



class Adapter implements TypeA{
    private $typeB;
    public function __construct($typeB){
        $this->typeB = $typeB;
    }

    public function insert(){
        $this->typeB->connect();
    }
}

$typeAimpl = new TypeAimpl();
$typeBimpl = new TypeBimpl();
$Adapter = new Adapter($typeBimpl);
$createA = new createA($typeAimpl);
$createB = new createA($Adapter);
$createA->dotypeA();
$createB->dotypeA();