PHP 3 Basic Design Patterns combined use

1.1 工厂模式, the factory method or class generates the object instead of the code directly in the new

    class Factory{              staticfunction getDatabase(){            returnnew Mysql($host$user$pass);        }    }    #使用    Factory::getDatabase();

1.2 单例模式To make an object of a class run only to create a

• 1. There is a private static object variable, specifically for the object of this class
• 2. There is a static method to create the object
• 3 a private constructor to prevent the external new object
• 4. There is a clone method to prevent clone return False
  Reference Article Singleton mode

 class Database {      //Single Object Properties    Private Static $instance;//define some global variables to store properties    Private $props=Array();//Private method of construction    Private  function __construct(){          Echo ' into construct! the class does not allow external creation of objects '; }//Return Single Instance     Public Static  function getinstance () {          //To determine if an instantiated object is already in existence        if(Empty( Self::$instance)) {//Can be override (dynamic parsing)             Self::$instance=New Static();//cannot be override (static parsing)            //self:: $instance = new self (); }return  Self::$instance; } Public  function __clone(){        return ' This class prohibits clone '; }//Set Properties     Public  function setProperty ( $key, $value) {          $this->props[$key] =$value; }//Get Properties     Public  function getpeoperty ( $key ) {          return $this->props[$key]; }  }//Use$DBOBJ= Database::getinstance ();$DBOBJ->setproperty (' Root_path ','/www ');$DBOBJ->setproperty (' Tmp_path ','/tmp ');///Next Delete the singleton, if you can also get the property you just added, it means that the same object is usedunset($DBOBJ);$DBOBJ= Database::getinstance ();Echo $DBOBJ->getpeoperty (' Root_path ');Echo $DBOBJ->getpeoperty (' Tmp_path ');

1.3 Registration mode, global share and Swap objects

• 1. The same need to use the unified registration of the object multiple aliases, unified call to use, (such as customers buy a machine must go to the factory identified institutions to buy, not everyone to the factory to buy)
• 2. The next time you want to use an object, do not need to use the factory, nor need to use a singleton mode, directly on the registrar to get it

     class Register () {        protected Static $objects; function set($alias, $object){             Self::$objects[$alias] =$objects; } function get($alias){            return  Self::$objects[$alias]; } function _unset($alias){            unset( Self::$objects[$alias]); }    }

2. Summary use

 class  factory  { static  function  getdatabase   ()  { //Singleton mode Get data object   $DBOBJ  = Database::getinstance ();            //registered to the global tree         Register::set ( ' db1 ' ,  $DBOBJ );     }}  #使用  //the first time the main file inside  factory::getdatabase ();    //use database objects for direct access to  Register::get ( ' db1 ' );  

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PHP 3 Basic Design Patterns combined use