PHP 3 basic Design Patterns in combination using _php tutorial

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{              static function getDatabase(){            return new Mysql($host, $user, $pass);        }    }    #使用    Factory::getDatabase();

1.2 单例模式 , making 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 object 3. There is a private constructor that prevents the external new object from being 4. There is a clone method to prevent clone return False
Reference Article singleton mode

Class Database {//Single object property private static $instance;      Define some global variables that need to hold the property private $props = Array ();      Private Function __construct () {echo ' into construct! the class does not allow external creation of objects ';  }//Returns a singleton public static function getinstance () {//To determine if an instantiated object already exists if (Empty (self:: $instance))              {//Can be override (dynamic parsing) Self:: $instance = new static ();          Cannot be override (static parsing)//self:: $instance = new self ();      } return Self:: $instance;    } public Function __clone () {return ' This class prohibits clone ';      }//Set property public function SetProperty ($key, $value) {$this->props[$key] = $value;      }//Get property Public Function Getpeoperty ($key) {return $this->props[$key];  }}//Use $DBOBJ = Database::getinstance ();  $DBOBJ->setproperty (' Root_path ', '/www ');  $DBOBJ->setproperty (' Tmp_path ', '/tmp '); Next, delete the Singleton object, and if you can get to the property you just added, use theIs the same object unset ($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 to add aliases, unified call to use, (such as customers buy a machine must go to the factory to buy, not everyone to the factory to buy) 2. The next time you want to use an object, you don't need to use a factory, and you don't need to use a singleton mode. Get it directly on the registrar.

    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(){            //单例模式获取数据对象            $dbObj = Database::getInstance();            //注册到全局树上            Register::set('db1', $dbObj);        }    }    #使用    //第一次主文件里面    Factory::getDatabase();    //以后使用数据库对象直接访问    Register::get('db1');

http://www.bkjia.com/PHPjc/1030445.html www.bkjia.com true http://www.bkjia.com/PHPjc/1030445.html techarticle PHP 3 Basic design pattern combinations Use 1.1 Factory mode, factory method or class to generate objects, instead of code directly new class factory{static function Getdatabase () {return n ...

