<?php
interface db{
function conn();
}
interface Factory{
function createDB();
}
class dbmysql implements db{
public function conn(){
echo '';
}
}
class dbsqlite implements db{
public function conn(){
echo '';
}
}
class mysqlFactory implements Factory{
public function createDB(){
return new dbmysql();
}
}
class sqliteFactory implements Factory{
public function createDB(){
return new dbsqlite();
}
}
// 工厂模式 ---- 例如多个类型数据库或者不同支付的时候用
class Factory{
public static function createDB($type){
if($type == 'mysql'){
return new dbmysql();
}else if($type == 'sqlite'){
return new dbsqlite();
}
}
}
$mysql = Factory::createDB('mysql');
$mysql -> conn();
//方式 2
$mysql = new -> mysqlFactory();
$db = $mysql->createDB();
$db -> conn();
?>