1、工厂模式
<?php
namespace Facebab;
class Factory {
static function createDatabase () {
return new Database();
}
}
$db = Facebab\Factory::createDatabase();
$db->fetchOne();
2、单例模式
<?php
namespace Facebab;
class Singleton {
private static $db = null;
private __construct() {
}
static function getInstance() {
if (self::$db != null) {
return self::$db;
} else {
self::$db = new self();
return self::$db;
}
}
private __clone() {
}
}
3、注册模式
<?php
namespace Facebab;
class Register {
private static $objects = array();
static function set($alias,$object) {
self::$objects[$alias] = $object;
}
static function _unset($alias) {
unset(self::$objects[$alias]);
}
static function get($name) {
return self::$objects[$name];
}
}
Register::set('db1',$db);
$db = Facebab\Register::get('db1');