<?php/**    php工厂模式    工厂模式：该工厂只负责生产和创建对象，工厂方法的参数是 你要生成对象对应的名称。    如下示例，在当前目录创建 Drive目录，    然后分别创建类文件 A.php,B.php    然后创建工厂类 Factory*///工厂类    class Factory{    public static function fac($type)    {        if(include_once ‘Drive/‘.$type.‘.php‘)        {            //echo ‘the className is:‘.$type.‘</br>‘;            return new $type;        }        else        {    echo ‘driver not found‘;            throw new Exception(‘Driver not found‘);        }    }}//使用工厂$a = Factory::fac(‘A‘);$a->method();$b = Factory::fac(‘B‘);$b->method();?>

<?php/**    单例设计模式-php    Singleton    用于一个类生成一个唯一的对象，比如常用的是数据库连接*/class Single{    //保存类实例在此属性中    private static $instance;        //构造方法声明为 private,防止直接创建对象    private function __construct()    {        echo ‘this is singleton!</br>‘;        echo ‘please do not create by yourself!</br>‘;    }        //单例方法    public static function singleton()    {        if(!isset(self::$instance))        {            $theClass = __CLASS__;            self::$instance = new $theClass;        }                return self::$instance;    }    //单例中的普通方法    public function hello()    {        echo ‘hello everyone! I am singleton  </br>‘;    }    //阻止用户复制对象实例    public function __clone()    {        trigger_error(‘do not clone the singleton.‘,E_USER_ERROR);    }}//$test = new Single();    //错误调用//单例的正确使用方式；$sing = Single::singleton();$sing-> hello();//clone测试//$test = clone $sing;    //会收到，上面的 clone错误；?>

<?php    header(‘Content-type: text/json‘);    header(‘Content-type: application/json;charset=UTF-8‘);        $arr = array(‘name‘=>‘jkk‘,‘age‘=>22,‘sex‘=>‘man‘,‘phone‘=>1321058559);    echo json_encode($arr);?>

<?phpclass Connection{    protected $link;    private $server,$user_name,$password,$db;        public function __construct($server,$user_name,$password,$db)    {        $this->server = $server;        $this->user_name = $user_name;        $this->password = $password;        $this->db = $db;                $this->connect();    }        private function connect()    {        //这里面初始为 $this->link 为 数据库连接；        echo "<hr>";        echo $this->server.‘</br>‘;        echo $this->user_name.‘</br>‘;        echo $this->password.‘</br>‘;        echo $this->db.‘</br>‘;    }    }$con = new Connection(‘ubuntuServer14‘,‘test‘,‘test‘,‘db‘);?>