三大设计模式简单入门
class Single{
//定义一个属性
public $siteName;
//本类的静态实例
protected static $instance =
null;
//私有的构造方法
private function __construct(
$siteName=''
){
$this->siteName =
$siteName;
}
//获取本类的唯一实例
public static function getInstance(
$siteName='PHP'
){
if(!self::
$instance instanceof self){
self::
$instance =
new self(
$siteName);
}
return self::
$instance;
}
}
//工厂模式
class Factory{
//创建指定类的实例
public static function create(){
return Single::getInstance('HTML JS CSS'
);
}
}
//注册树模式
class Register{
public static $obj =
[];
public static function set(
$alias,
$objects){
self::
$obj[
$alias] =
$objects;
}
public static function get(
$alias){
return self::
$obj[
$alias];
}
public static function _unset(
$aliass){
unset(self::
$obj[
$alias]);
}
}
//注册一个hello类的实例，放到对象池
Register::set('hello',Factory::
create());
//从对象池中获取hello类
$obj = Register::get('hello'
);
//查看属性
var_dump(
$obj->siteName);
转载于:https://www.cnblogs.com/gyfluck/p/9994115.html
