1. Single-case mode
Class danli{//Privatization class object store variable private static $_instance;//privatization constructor Private function __construct () {}//privatization clone function Private FU Nction __clone () {}//class instantiation interface public static function getinstance () {if (! Self::$_instance instanceof self) {self::$_instance = new Self;} return self::$_instance;} Gets the user name according to the User ID public function getusername ($id) {//Get Data Operation Return "returns the last data: {$id}";}} $Danli = Danli::getinstance (); Echo $Danli->getusername (2);2. Abstract Factory mode //defines an abstract class. Abstract method Abstraction class createobj{ abstract static function GetValue ($num 1, $num 2);} //definition addition calculation Class class Calculationadd extends createobj{ public static function GetValue ($num 1, $num 2) { return $num 1 + $num 2; }}//define multiplication classes class Calculationsub extends createobj{ &n Bsp public static function GetValue ($num 1, $num 2) { return $num 1 * $num 2; }}//Define Total Control class-Select Select the specified object class calculation{ public static function Getclassobj ($type) { switch ($typ e) { case ' + ': &NBSP ; return new Calculationadd (); &NB Sp break; case ' * ': return NE W calculationsub (); &NBSP; break; } }} $Calculation = Calculation::ge Tclassobj (' + '); Echo $Calculation->getvalue (1,3); 3. Simple Factory mode Simple Factory mode: Static Factory mode. Simple engineering mode is the creation of objects through a static method interface createobj{function GetValue ($num 1, $num 2);}//Add Operation class Calculationadd implements createobj{function GetValue ($num 1, $num 2) {return $num 1 + $num 2; }}//Multiplication classes class Calculationsub implements createobj{function GetValue ($num 1, $num 2) {return $num 1 * $num 2; }}//Operation control class simplefactory{public static function Createadd () {return new Calculationadd (); } public static function Createsub () {return new calculationsub (); }} $ADD = Simplefactory::createadd (); Echo $Add->getvalue (1,4). " <br/> "; $Sub = Simplefactory::createsub (); Echo $Sub->getvalue (2,3);
PHP design mode
