|
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<?php
/**
* 工廠方法模式
*
* 定義一個(gè)用于創(chuàng)建對象的接口,讓子類決定將哪一個(gè)類實(shí)例化,使用一個(gè)類的實(shí)例化延遲到其子類
*/
/*
class DBFactory
{
public static function create($type)
{
swtich($type)
{
case "Mysql":
return new MysqlDB(); break;
case "Postgre":
return new PostgreDB(); break;
case "Mssql":
return new MssqlDB(); break;
}
}
}
*/
class DBFactory
{
public static function create($type)
{
$class = $type."DB";
return new $class;
}
}
interface DB
{
public function connect();
public function exec();
}
class MysqlDB implements DB
{
public function __construct() {
echo "mysql db<br/>";
}
public function connect() {
}
public function exec() {
}
}
class PostgreDB implements DB
{
public function __construct() {
echo "Postgre db<br/>";
}
public function connect() {
}
public function exec() {
}
}
class MssqlDB implements DB
{
public function __construct() {
echo "mssql db<br/>";
}
public function connect() {
}
public function exec() {
}
}
$oMysql = DBFactory::create("Mysql");
$oPostgre = DBFactory::create("Postgre");
$oMssql = DBFactory::create("Mssql");
php技術(shù)：php設(shè)計(jì)模式 Factory(工廠模式)，轉(zhuǎn)載需保留來源！
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