php objects patterns and practice

Method Static Public functionGetinstanceentry () {//public static method, the entry of an external instance object if(!self::$objInstanceof self) {//instanceof Determining whether an object is instantiatedSelf::$obj=NewSelf ();//or the new Danli () } returnSelf::$obj; } Public functionGetName ($nn){ return $nn; }}$t= Danli::getinstanceentry ();Echo $t-GetName (' ABC '));?>Factory mode: Is a class, in this class is some way to create

In-depth PHP: Object-oriented, model, and practice (version 2nd) Basic Information Author: (US) Matt zandstraTranslator: Chen Hao; Wu sunbin; Hu DanSeries name: Turing programming SeriesPress: People's post and telecommunications PressISBN: 9787115225788Mounting time:Published on: February 1, May 2010Start: 16Other Details View: http://www.china-pub.com/196636 Introduction This book thoroughly analyzes the

First understand the concept of the Observer pattern: an object is made observable by adding a method that allows another object, the observer to register itself. When an observable object changes, it sends the message to the registered observer. These observers use this information to perform operations that are independent of observable objects. The result is that objects can talk to each other without kn

Overview: As an object's creation pattern, a singleton ensures that only one instance exists in an intrinsic system and that it cannot create a copy. The Clone function (__clone) and the constructor (__construct) must be declared private, preventing the external program from creating a new class and losing the meaning of the singleton pattern. The PHP language is an interpreted language, and when the page is executed, all related resources

This article introduces three kinds of commonly used PHP design patterns: Singleton mode, Factory mode, observer mode, has a good reference value, followed by small series to see it First, the singleton mode The so-called Singleton pattern is that only one instance of this class exists in the application. Typically, singleton mode is used in instances where only the database access object is allowed, there

Notes on three common design patterns in php Class SingetonBasic { Private static $ instance; // Other vars .. Private function _ construct (){ // Do construct .. } Private function _ clone (){} Public static function getInstance (){ If (! (Self: $ instance instanceof self )){ Self: $ instance = new self (); } Ret

', ' }}/*** Billing class processing rebate, here is Reback RMB**/Class Checkouts implements observerable{Public Function Update () {Echo ' Cashback 10rmb ', ' }}/*** User level class processing user level.**/Class ranks implements observerable{Public Function Update () {Echo ' Raise grade level ', ' }}/*** Promotion Category**/Class Promotion {Private $observers = Array ();Public Function Register (observerable $o) {//Register ObserverArray_push ($this->observers, $o);}Public Function Notify (

is conceived out, so oriented to abstract design is in line with human thinking. In addition, this principle will be well supported by the OCP, and the abstraction-oriented design allows us to not rely too much on implementation, so that the extension becomes possible, and this principle is the cornerstone of another article, design by contract.4) Interface segregation Principle (ISP), interface isolation principle, "breaking large interfaces into multiple small interfaces", the benefits are ob

the Observer. The coupling degree is quite low. How do I implement an observer registration? It's easy to give us ideas through the previous registrant model and add these objects to a registered tree. How to notify? This is even simpler, by traversing the registration tree, allowing each object to implement the operations provided by its interface. The so-called pattern, more is an idea, there is no need to rigidly adhere to the code details. The O

/*** 观察者模式* @author: Mac* @date: 2012/02/22*/classPaper{ /* 主题 */private$_observers= array();publicfunction register($sub){ /* 注册观察者 */$this->_observers[] = $sub;}publicfunction trigger(){ /* 外部统一访问 */if(!empty($this->_observers)){foreach($this->_observers as$observer){$observer->update();}}}}/*** 观察者要实现的接口*/interfaceObserverable{publicfunctionupdate();}classSubscriber implementsObserverable{publicfunction update(){echo"Callback\n";}} Here is the test code /